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1THEASTRONOMICALCOLLECTION2023-2024ASTRONOMY,TIMEINITSPURESTFORM

CONTENTSPREFACE08MORETHAN48YEARSOFASTRONOMICALCOMPLICATIONS12ASTRONOMY34DUTCHASTRONOMERS46THEATELIER54THECVDKSIGNATURE58COLLECTIONOFASTRONOMICALMASTERPIECES60COLLECTIONOFTHESTARS104COLLECTIONOFTHEATELIER124THECVDKWATCHCONFIGURATOR128ATELIERCHRISTIAANVANDERKLAAUWIN‘HETARSENAAL’INTHECITYNAARDEN,THENETHERLANDSWINNINGTHEGPHG130SERVICE&WARRANTY146COLLABORATIONWITHVANCLEEF&ARPELS150TERMINOLOGY162REFERENCEREGISTER172

CVDKPLANETARIUMEISEEISINGALIMITEDEDITION

ETERNALFASCINATIONTHEMANAGINGBOARDOFCHRISTIAANVANDERKLAAUW:PIMKOESLAG,MARIAREINTJESANDDANIËLREINTJES

CHRISTIAANVANDERKLAAUWPREFACE9WINNERWewillalwaysrememberourchildhoodandtheunspoiledfascinationwithdiscoveringtheworldaroundus.Aschildrenwehavelookedatthestarswithoutfullycomprehendingwhatwesaw,butthebeautyofourskieshasstayedoursourceofinspiration.ChristiaanvanderKlaauwAstronomicalWatchesistheonlyatelierintheworldthatistotallydedicatedtodesigningandmanufacturingexclusivehand-madeastronomicalwatches.Wecombinethebestinclassicalwatchmakingwithdesignsthatemphasizethebeautyofeachastronomicalcomplication.OurspecializedinstrumentmakersandwatchmakersturneachChristiaanvanderKlaauwwatchintoastunningpieceofmechanicalperfectionandaworthytributetotheeternalfascinationwiththeskiesaroundus.Inthemorethan48yearsthathaspassedsincethefirstChristiaanvanderKlaauwclockstartedticking,wehavegraduallyintroducednewastronomicalcomplications,leadingtothecomprehensivecollectionofmodelsyouwillfindinthiscatalogue.Wehopeyouwillenjoyowningyourwatchasmuchaswedidmanufacturingit.PIMKOESLAGTECHNICALDIRECTOR&MASTERWATCHMAKERDANIËLREINTJESC.E.O&CREATIVEDIRECTORMARIAREINTJESMARKETINGDIRECTOR

MERCURYVENUSEARTH

MARSJUPITERSATURN

12CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONSMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONSMR.CHRISTIAANVANDERKLAAUW

CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONS13In2022,wecelebratedthefactthatChristiaanvanderKlaauwpresentedhisfirstastronomicalclock48yearsago;26yearsagoheproducedhisfirstwristwatchwithastronomicalcomplications.Itisacelebrationinitspurestform,withabalancedcollectionofuniqueastronomicalwatches.ChristiaanvanderKlaauw(1944)wasborninLeiden,thecitywheretheNetherlands’greatestscientistofalltimes,namesakeandinspirationChristiaanHuygensstartedhisstudiesin1645.VanderKlaauwattendedtheSchoolforInstrumentMakers(LiS)inLeiden,thecurriculumwasestablishedin1901attheinitiativeofProf.Dr.HeikeKamerlinghOnnes.197419761978‘CVDKSCHIPPERSSTOELKLOK’WITHMOONPHASE,LIMITED200PIECESCVDKFRIESESTOELKLOK’WITHMOONPHASE,LIMITED500PIECESTHENEWATELIERINJOURE,FRIESLAND,THENETHERLANDS

14CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONSINSTRUMENTSWhenKamerlinghOnneswasappointedprofessorinexperimentalphysicsin1882itwascommonpracticeforthephysiciststomaketheirowninstruments.ThescientistconsideredthisnonsensicalandinitiatedthefoundingoftheLiS.Thistradeschooldescribesinstrumentmakersas‘handymen,puzzlesolversandinventorswhousetheirtechnicalknowledgeandcreativitytomakejust198019821983‘CVDKCARILLONKALENDERKLOK’WITH3DREALMOONPHASEANDDECLINATIONOFTHESUN,LIMITED200PIECES‘CVDKPLANETARIUMSTOELKLOK’INCELEBRATIONOFTHE200THANNIVERSARYOFTHEPLANETARIUMFRANEKER,FRIESLAND,THENETHERLANDS,LIMITED50PIECES‘CVDKGLOBEKLOK’WITHREALMOONPHASE,LIMITED35PIECES

CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONS15aboutanythingconceivable’.ThiscertainlyappliedandappliestoVanderKlaauwwho,inthecourseofhistraining,acquiredpracticalexperienceattheLeidseSterrewacht,theworld’soldestuniversityaffiliatedobservatory,whichwasestablishedin1633.InthismagicalworldofstarsandplanetsChristiaanvanderKlaauw’sloveofastronomyburgeoned.198619881989‘CVDKSTOELKLOK’WITHROTATINGSUNANDMOON,LIMITED5PIECES‘CVDKPLANISPHEREKLOK’,WITHROTATINGSUNANDMOONPHASE,LIMITED24PIECES‘CVDKPLANETOASTROLABIUM’,WITHA3DPLANETRIUM,ASTROLABEANDPLANISPEREOFNORTHERNANDSOUTHERNHEMISPHERE,LIMITED40PIECESBECOMESANHONORARYMEMBEROFTHEPRESTIGIOUSSWISSAHCI

16CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONSCELESTIALBODIESGoodinstrumentmakersareabletomakewhattheireyescanseeandarecertainlycapableofmakingtimepieces.TheideaofcombiningthemathematicallypredictablemovementsofcelestialbodieswithaclockwasanideathatwascertainlynotuniquetoVanderKlaauw.Astronomicalclockshad199119921995‘CVDKPLANETARIUM’TABLECLOCKWITHPLANETARIUMANDPLANISPHERE,LIMITED3PIECES‘CVDKPENDULEVARIABLE’TABLECLOCKWITHROTATINGSUNANDMOONANDASTROLABE,LIMITED24PIECESAWARDEDINBASELWITHTHEGOLDENMEDAL‘CVDKKEPLER’SPLANETARIUM’TABLECLOCK,PLANETARIUMWITHECCENTRICORBITS,LIMITED24PIECES

CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONS17beenmadethousandsofyearsearlierandtheNetherlandshadtheFriesianEiseEisinga(1744-1828),avirtuosowhohadbuiltahighlyaccurateplanetariuminahouseinFraneker.AfterChristiaanvanderKlaauwhadcompletedaclockmaker’scourseaswellhemovedfromLeidentoJourein1967,wherehestartedworkingforaproducerofFriesiangrandfatherclocks.199619992000‘CVDKSATELLITEDUMONDE’VANDERKLAAUW’SFIRSTWRISTWATCH‘CVDKPLANETARIUM’THESMALLESTMECHANICALPLANETARIUMINTHEWORLDNOMINATEDIN2001FORTHECHRONOSINNOVATIONPREIS‘CVDKMILLENIUM2000’NOMINATEDIN2001FORTHECHRONOSINNOVATIONPREIS

18CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONSINDEPENDENTWATCHMAKERIn1974VanderKlaauwstartedhisownbusinessandpresentedhisfirstclock,withastronomicalcomplications.Itwasthestartofanexceptionalstorythatmadehimoneofthebestclockmakersintheworld,sawhimreceive(in1989)anhonorarymembershipoftheSwissAcadémieHorlogèredesCréateursIndépendants(AHCI),whosemembersincludewatchmakinggreatssuchasVincent200120022003‘CVDKARIADNE’‘CVDKECLIPS’‘CVDKASTROLABIUM’

CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONS19Calabrese,GeorgeDaniels,François-PaulJourneandFranckMuller.In1992,hewontheawardforthemostinnovativemovementdesignforhisPenduleVariableinBasel,Switserland.Twoyearslaterhestartedwithhisfirstwristwatch,theCVDKSatelliteduMonde-withastronomicalcomplications,ofcourse.Thewatchshowedthetime,dayanddate,aswellasthemoonphase,dayandnightindicator200420052006‘CVDKMONDIAL’‘CVDKREALMOON’‘CVDKVENUS’

20CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONSandtheplaceonearthwhereitisexactlynoonatthetimeyouarelookingatyourwatch.Itremainsanamazingandelegantwatcheventoday.In1999hepresentedthemasterpieceCVDKPlanetarium,equippedwiththesmallestmechanicalplanetariumintheworld.MakingwristwatcheswasthestartofanewphaseinthelifeoftheNetherlands’mostimportantwatchmaker.200820092010NEWMODERNATELIERINHEERENVEEN,FRIESLAND,THENETHERLANDSAFTER10YEARSOFFRIENDSHIPANDWORKINGTOGETHER,MR.DANIËLREINTJESBECAMETHESUCCESSOROFMR.VANDERKLAAUWTOGETHERWITHMARIAREINTJES‘CVDKRETROMOON’AWARDEDWATCHOFTHEYEAR2011

CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONS21NEWERAIn2009,anewerabeganforChristiaanvanderKlaauw.HewassucceededbytheDutchdesignerDaniëlReintjes.DaniëlReintjeshadknownChristiaanformanyyears,eversincehehadaskedhimtoproducewatchesforhisowndesignerlabel‘DarkRush’.HegotonextremelywellwiththewatchmakerherespectedsohighlyandbroughtdesignerMariaReintjesvanLaarintotheprojectasfellowshareholderandtogetherstartedrepositioningthebrand.2011‘CVDKORION’‘CVDKRETROMOON’‘CVDKREALMOON1980’NOMINATEDEUROPEANWATCHOFTHEYEAR2012AWARDEDWATCHOFTHEYEAR2011INNOVATIONAWARDAWARDEDEUROPEANWATCHOFTHEYEAR2012

22CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONSDANIËL&MARIAREINTJESThenewdirectorsdecidedtofocusexclusivelyonastronomicalwatches;thephrase‘astronomicalwatches’wasaddedtothebrandnameandmodelswithnew,beautifulastronomicalcomplicationswereadded.Thisnewdirectionwasimmediatelyawardedbywinningthe‘WatchoftheYearAward’in2011,andtheEuropeanWatchoftheYearAwardin2012,2014and2016.2012‘CVDKCERES1974’‘CVDKREALMOON1980’AWARDEDEUROPEANWATCHOFTHEYEAR2012READERSAWARD‘CVDKREALMOONJOURE’THEMOSTACCURATE3DMOONPHASEINTHEWORLDNOMINATEDEUROPEANWATCHOFTHEYEAR2013

CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONS23Buttheastronomicalnewdirectionandcreationswerenotabouttostophere-ultimatelycreatingtheHauteHorlogerierecognitionbytheFondationHauteHorlogerie(FHH)andwinningthemostprestigiouswatchprizeinthetheworld,theGrandPrixd’HorlogeriedeGenève(GPHG)-inthefutureahead.20132014‘CVDKPLANETARIUMTAFELHORLOGE’TABLECLOCKWITHA3DPLANETRIUM,LIMITED24PIECES‘CVDKNEWPLANETARIUM’NOMINATEDEUROPEANWATCHOFTHEYEAR2013COLLABORATIONWITHVANCLEEF&ARPELS‘THEMIDNIGHTPLANETARIUMPOETICCOMPLICATION’APLANETARIUMMODULEDEVELOPEDBYCHRISTIAANVANDERKLAAUWEXCLUSIVELYFORVANCLEEF&ARPELS

24CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONSSUPERIORSIMPLICITYAllwatchesfeaturethesame,roundcasedesign.Eachofourwatchesisinstantlyrecognisable,withthehourindexesaboveanimaginaryhorizon,theastronomicalcomplicationnormallysituatedatthe6o‘clockpostition,aradiantlydecorateddialandatransparantcasebackwithabeautifulCVDKrotor.Andfinalyastylisedpictureofthesunwith12claws(Klaauw=claw)at12o‘clock,thesun’szenith.2015‘CVDKREALMOONJOURE40Y’‘CVDKHYPERNOVA’‘CVDKREALMOONJOURE’AWARDEDEUROPEANWATCHOFTHEYEAR2014READERSAWARD‘CVDKREALMOONTIDES’

CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONS25HAUTEHORLOGERIEChristiaanvanderKlaauwislistedsince2016as‘HauteHorlogerie’ontheWhitePaperlistoftherespectedFondationdelaHauteHorlogerie(FHH)inSwitzerland.TheFHHdidresearchon600watchbrandsfor3years-doneby46experts-with29distinguishingcriteria.Only64luxurybrandsintheworldqualifyandandcanclaimtherespectedtermof‘HauteHorlogerie’.2016‘CVDKSUPERNOVA’‘CVDKTITANPERPETUAL’‘CVDKREALMOONTIDES’AWARDEDEUROPEANWATCHOFTHEYEAR2016

26CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONSCOLLABORATIONWITHVANCLEEF&ARPELSIn2014thelegendarymaisonVanCleef&Arpelspresentedthemesmerizingtimepiece‘MidnightPlanétariumPoeticComplication’attheSIHHinGeneva.In2018theMaisonastonishedtheworldagainbypresentingtheextraordinarytimepiece‘LadyArpelsPlanétarium’.2017LISTEDAS‘HAUTEHORLOGERIE’ONTHEWHITEPAPERLISTOFTHEFONDATIONDELAHAUTEHORLOGERIE(FHH)INSWITZERLANDONLY645LUXURYWATCHBRANDSCANCLAIMTHETERMOF‘HAUTEHORLOGERIE’‘CVDKREALMOONJOUREZODIACSIGNSCORPIO’CUSTOMMADEHANDENGRAVEDZODIACSIGNONEOFFINTHEWORLD‘CVDKREALMOONSTELLANEBULA’COLLABORATIONWITHTHESTELLAPOLAREGALLERYINTOKYOACUSTOMMADECOLLECTIONCONTAININGTHERAREPRE-HISTORICAMMOLITESTONE

CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONS27BothHauteHorlogeriemasterpiecesareequippedwithacomplexPlanetariummoduledevelopedinSwitzerlandbyChristiaanvanderKlaauw,exclusivelyforVanCleef&Arpels.WinneroftheprestigiousGrandPrixd’HorlogeriedeGenève(GPHG)in2018inGenevainthecategoryLadies’Complication.2018‘CVDKPLANETARIUMZODIACSIGNSAGITTARIUS’CUSTOMMADEHANDENGRAVEDZODIACSIGNONEOFFINTHEWORLD‘CVDKREALMOONJOUREHORIZON’OILPAINTINGLIMITED8PIECESWINNEROFTHEGPHG2018VANCLEEF&ARPELS‘THELADYARPELSPLANÉTARIUM’COLLABORATIONVANCLEEF&ARPELSANDCHRISTIAANVANDERKLAAUW

28CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONSINTHEWORLDIn2024wewillcelebrateour50-yearanniversary.Untiltoday,ChristiaanvanderKlaauwAstronomicalWatchesistheonlyatelierintheworldthatiscompletelydevotedtothedesignandtheproductionofexclusive,hand-madeastronomicalwatches.20192020CVDKWATCHCONFIGURATORCREATEANDORDERYOUROWNDESIGNEDCHRISTIAANVANDERKLAAUWTIMEPIECE‘CVDKPLANETARIUMEISEEISINGA’6LIMITEDEDITIONSCOLLABORATIONWITHTHE‘ROYALEISEEISINGAPLANETARIUM’THEOLDESTSTILLWORKINGPLANTERARIUMINTHEWORLD

CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONS29WINNEROFTHEGPHG,THEGRANDPRIXD’HORLOGERIEDEGENÈVEChristiaanvanderKlaauwwontheGrandPrixd’HorlogeriedeGenève(GPHG)in2021.KnownasthemostprestigiousWatchAwardintheworld,the‘Oscars’ofwatchmaking.TheCalendarandAstronomyWatchPrizewasawardedtotheChristiaanvanderKlaauwCVDKPlanetariumEiseEisinga.ThisHauteHorlogeriemasterpiececontainsthesmallestmechanicalPlanetariumintheworld,showingrealtimetheorbitsofMercury,Venus,Earth,Mars,JupiterandSaturnaroundtheSun.2021‘CVDKREALMOONTIDESINTERSCALDESEDITION’HAUTECUISINEMEETSHAUTEHORLOGERIE3STARMICHELINEDITIONWINNEROFTHEGPHG2021CALENDARANDASTRONOMY‘CVDKPLANETARIUMEISEEISINGA’ITCONTAINSTHESMALLESTMECHANICALPLANETARIUMINTHEWORLD

30CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONSPIMKOESLAGMasterwatchmakerPimKoeslaghasacquiredamajoritystakeinCVDKonthe1stofJune2022.KoeslagjoinedtheexistingmanagingboardasTechnicalDirector,alongwithDaniëlReintjes(CEO/CreativeDirector)andMariaReintjes(MarketingDirector)whoretainedashareinthecompany.PimKoeslagwasbornin1981inAlmelo,TheNetherlands.Attheageof18,heattendedwatchmakingschoolinAmsterdam,wherehewontheprizeforthebestwatchmakeratschool.ThissuccessgavehimtheopportunitytodoanextensivetrainingatPatekPhilippeinGeneva.Afterhistraininghe2022‘CVDKREALMOONJOUREGREENMETEORITE’‘CVDKPLANETARIUMDUNESOFMARS’6LIMITEDEDITIONS

CHRISTIAANVANDERKLAAUWMORETHAN48YEARSOFASTRONOMICALCOMPLICATIONS31startedworkingatFrederiqueConstantasTechnicalDirector.Duringthis20-yearperiodasTechnicalDirector,hedevelopednofewerthan30calibres,amongthematourbillon,aminuterepeaterandachronograph.KoeslagwasalsoresponsibleforstartingtheluxurybrandAteliersdeMonacowhereheheldthepositionofCEO.AfterlivingandworkinginGenevaforover20years,theKoeslagfamilyreturnedtotheNetherlands.RightatthesametimewhenDaniëlandMariaReintjeswerelookingtoreinforcethecompanytoprepareforthenextphaseforChristiaanvanderKlaauwAstronomicalWatches.Thissolidnewmanagingboardwillguaranteecontinuityofthecompanyinthefuturewithmanymoreastronomicalmasterpiecesahead.ONTHE1STOFJUNE2022MASTERWATCHMAKERPIMKOESLAGACQUIREDAMAJORITYSTAKEINCVDK.HEJOINEDTHEEXISTINGMANAGINGBOARDASTECHNICALDIRECTOR,ALONGWITHDANIËLREINTJES(CEO/CREATIVEDIRECTOR)ANDMARIAREINTJES(MARKETINGDIRECTOR)WHORETAINEDASHAREINTHECOMPANYFALL2022,THENEWLOCATIONOFTHEATELIERCHRISTIAANVANDERKLAAUWIN‘HETARSENAAL’INTHECITYNAARDEN,THENETHERLANDS

34CHRISTIAANVANDERKLAAUWASTRONOMYASTROLABETHETAMEDUNIVERSESincethedawnofmankindthesunandthemoonhavebeenadominantbutlittleunderstoodphenomena.TodayweknowthattheEarthrevolvesaroundthesunandthemoonaroundtheEarth.Clearlightsweredominatedbyabright,starrysky,becausetherewasnolightpollutionandtheMilkyWaywasclearlyvisibleasabrightbandofstars.OnlyinmoderntimesdiditbecomeclearthattheMilkyWayisnothingmorethanpartoftheenormoussolarsystemtowhichoursunalsobelongs.

CHRISTIAANVANDERKLAAUWASTRONOMY35notemitlightbutreflectthelightfromthesun.ThebrightestweretheMorningandEveningStar,ofwhichitwasdiscoveredonlymuchlaterthattheyareoneandthesameplanet:Venus.Theweaker‘star’MercurywasmentionedbytheBabyloniansasPeoplestartedtointerpretgroupsofstarsthatwereclosetoeachotherinthefirmament(butthatinrealityrarelyhadanythingtodowitheachother)asconstellations.Amidstthestablepictureofconstellationsthereweresomeindividualstars.Onlymuchlaterdiditbecomeevidentthatthese‘wanderingstars’aretheplanetswhich,liketheEarth,revolvearoundthesun.Planetsthemselvesdoearlyas3000BC.Mars(theredplanet),JupiterandSaturnwerealsorecognisedinAncienttimes.Alltheseplanetsarevisiblewiththenakedeye.Weakerplanetswereobservedthankstothedevelopmentofthetelescope:Uranusin1781,Neptunein1846andPlutoin1930.However,in2006Plutowasdowngradedtoadwarfplanet,ofwhichmorewerefound,evenfurtherawaythanPluto.

36CHRISTIAANVANDERKLAAUWASTRONOMYARISTOTLEHELIOCENTRICThankstotheoldGreekslikePlato,AristotleandPtolemaeusweknewhowallofthesecelestialbodiesmovedinrelationtoeachother:theEarth-theythought-wasthecentreoftheuniverseandtheothercelestialbodiesrevolvedaroundtheEarth,thegeocentricmodel.Therulingclasseselevatedthisstandpointtoadogma,whichmadeitNIKOLAASCOPERNICUShazardoustosuggestadifferentmodel,asGalileodiscoveredtohisdetriment.However,thetruthcouldnotremainsuppressedforeverandtheheliocentricmodel-whichismostly

CHRISTIAANVANDERKLAAUWASTRONOMY37JOHANNESKEPLERassociatedwiththenamesofCopernicus(1473-1543)andJohannesKepler(1571-1630)-eventuallybecameuniversallyaccepted:theplanets,andthereforetheEarthaswell,revolvearoundthesun.ThetrajectoryoftheEarth(andoftheotherplanets)isnotperfectlycircular,butthedeviationisminor.Themovementsofthecelestialbodiesaredescribedbyelementarylawsofphysicsandcanbeduplicatedwiththeaidofcogwheels.GALILEOGALILEI

38CHRISTIAANVANDERKLAAUWASTRONOMYAXIALTILTOFTHEEARTHPERPENDICULARTOORBITAXIALTILTOROBLIQUITYNORTHCELESTIALPOLEROTATIONAXISCELESTIALEQUATORCOMPLEXORBITDIRECTIONThetrajectoriesofalltheplanetsareroughlyinthesameECLIPTICspherebecausetheplanetswereallformedfromaflat‘disc’ofmatterthatrevolvesaroundthesun.Thisdiscisalsoreferredtoastheeclipticplaneor‘theecliptic’.TheEarth’srotationalaxisisSOUTHCELESTIALPOLEinclinedatanangleof23.5°tothisplaneasis,therefore,theplanethroughtheEarth’sequator.TheEarth’srelationtotheeclipticislikethatofaspinningtopthatisn’tstandingstraightand-likethisspinningtop-gravityismakingitwobble;theEarth’srotationalaxisslowlytracesoutaconeshapeundertheinfluenceofthesun’sgravitationalpull.Thisphenomenoniscalled‘precession’.

CHRISTIAANVANDERKLAAUWASTRONOMY39ZODIACSIGNSONTHESTMARK’SCLOCKINVENICE,ITALYThisprecessionaffectstwowaysofmeasuringthetime.Inthesolartimethatisgenerallyusedthedurationofadayandnight(bydefinition24hours)isdeterminedbythetimebetweenthe2subsequentpointswhenthesunisatitszenith.Insiderealtime(‘startime’)24hoursaremeasuredbythetimethatlapsesbetweentwoconsecutivepassagesofthesamestaralongafixedmeridian.Becauseoftheprecession,asiderealdayisnotexactlyidenticaltoasolardayandis23.9344699hours,or23hours56minutesand4.0916seconds.Thedatesonwhichwinterturnstosummerandsummerturnstowinterarecalledthe‘equinoxes’.ThesetwiceyearlyeventsarealsothetimewhentheEarth’saxisdoesnotpointtothesunorawayfromthesun.Atthesetimesthedaysandnightsareequalinlength.TheprecessionoftheEarth’srotationalaxisalsoshiftstheequinoxesoveraperiodofaround20,000years.AlongtheeclipticyoucanpicturetheZodiac,consistingofthe12starsignsthatareknownmorebecauseofastrologythanfortheirastronomicalsignificance.

40CHRISTIAANVANDERKLAAUWASTRONOMYANCIENTTIMESThehistoryofmovementsstartswithmovementsforchurchclocks,andevenforthose,astronomicalcomplicationswerefirstincorporatedalongtimeago.ThebestdescribedASTRARIUMOFGIOVANNIDONDIDELL’OROLOGIOplanetariumclock(alsoreferredtoas‘astrarium’)fromthisperiod,whichhadnofewerthan107cogwheels,wasbuiltinItalybyGiovanniDondidell’OrologioalsoknowasGiovannide’Dondi(1330-1388).Farbackinhistorychurchesalreadyhadclocks,becauseitwasconsideredveryimportantthatthevariouschurchserviceswereheldattherighttimes.Whereasthefirstclocksonlyhad

CHRISTIAANVANDERKLAAUWASTRONOMY41asinglehandforthehours,aminuteshandwassoontofollow.Themovementsweresubsequentlyexpandedwitharangeofcomplications,includingastronomicalones.Ofcourse,thereisthewonderfromtheNetherlands,theplanetariumofEiseEisingainthelittletownFraneker,theoldestfunctioningplanetariumintheworld.Eisinga,awoolcarder,builttheplanetariumin1774-1781using10,000hand-forgednailsascogs.Today,Mercury,Venus,theEarth,JupiterandSaturnstillrevolvearoundthesunatthecorrecttimes.Theplanetariumispoweredbyapendulumclockand9weights.DANIËLREINTJESANDTHEINCREDIBLEASTRONOMERHANSNOORDMANS(1929-2014)ATTHEEISEEISINGAPLANETARIUM

42POCKETANDWRISTWATCHESAnastronomicalclockisaclockwhich,inadditiontothetimeofday,givesastronomicalinformation.Thismaybethepositionofthesunormoon,themoonphase,thesiderealtimeorevenarevolvingstarchart.Aninterestingdetailisthefactthatastronomicalclocksnormallyusethegeocentricmodel,oftenwiththeEarthinthecentreofthedial.Theeclipticdialistheprojectionoftheeclipticplane,shownoff-centreonthedialandappearstobedistorted,asaresultoftheangledpositionoftheEarth’srotationalaxiscomparedtotheeclipticplane.TheeclipticdialmakesonerevolutionCHRISTIAANVANDERKLAAUW,CVDKASTROLABIUM

CHRISTIAANVANDERKLAAUWASTRONOMY43every23hours,56minutesand4.0916seconds(inotherwords,onesiderealday).Thecomplicationsusedinastronomicalclocksformthebasisforsmallerastronomicalincompressingastronomicalcomplicationsintomovementssmallenoughtobeusedinwristwatches.ChristiaanvanderKlaauwisoneofthesepioneers.movements,initiallyinclocks,theninpocketwatchesandfinallyinwristwatches.Itwasalogicalprogressionthatmovementmakerswouldtrytoreduceastronomicalcomplicationstosuchanextentthattheywouldfitinsideawatchcase.Atourbillonmaybecomplicated,butmanyastronomicalcomplicationscouldonlybemadebytheverybestwatchmakersandbrands.Becauseoftheirsize,pocketwatchesweremostsuitable;themoresizeablethebetter.Butintheend,theworld’sbestwatchmakerssucceededBEAUTYWithanastronomicalwatch,awatchbrandprovesthatitswatchmakershavemasteredthemostdifficultcomplications.Fortheaficionadothemostimportantthingishowincrediblycleverthesecomplicationsareand,equallyimportant,howbeautifultheyoftenare.AtChristiaanvanderKlaauw,inspireddesignandclassicwatchmakingarecombinedtocreateworksofeternalbeauty.CHRISTIAANVANDERKLAAUW,SMALLESTMECHANICALPLANETARIUMINTHEWORLD

46CHRISTIAANVANDERKLAAUWDUTCHASTRONOMERSPENDULUMCLOCKDUTCHSTARSAREMAPPINGTHEUNIVERSEMaybeithasbeentheDutchskiesmadefamousbythepaintersduringtheGoldenAge.Maybeahistoryofnon-conformistthinkingisthekey,orthefactthatthefirstpatentforatelescopewasgrantedintheNetherlandsin1608toDutch/GermanopticianHansLipperhey(GalileoGalileiimprovedLipperhey’sinventiononeyearlater).Butwhateverthereason,itisafacttheNetherlandshaveproducedadisproportionatenumberofworldclassastronomersandastrophysicists.EveryChristiaanvanderKlaauwwatchpaystributetotheDutchcontributionstoastronomy.CHRISTIAANHUYGENS,INVENTOROFTHEPENDULUMMOVEMENT

CHRISTIAANVANDERKLAAUWDUTCHASTRONOMERS47Inthe17thand18thcenturyDutchastronomersplayedamajorpartinexpandingourknowledgeoftheskies.LeidenUniversityfoundedtheworld’sfirstastronomicalobservatoryin1633,Utrechtfollowedsuitin1644(atthemomenttheNetherlandsfeatureapproximately30publicobservatories).PieterKeyser(1540-1596)wasthefirsttomapanumberofconstellationsofthesouthernhemisphere.ChristiaanHuygens(1629-1695)discovered-amongmanyotherthings-theringsandthemajormoonofSaturn(Titan).Thisuniversalgeniuswasalsoofgreatimportancetothedevelopmentofclocksandwatcheswithhisinventionofthependulummovement.MaartenvandenHove(1605-1639)HANSLIPPERHEY-INVENTOROFTHETELESCOPE,LATERIMPROVEDBYGALILEOGALILEI

48CHRISTIAANVANDERKLAAUWDUTCHASTRONOMERSFREDERIKKAISER,CALCULATEDTHEROTATIONTIMEOFMARSdevelopedanaccuratemethodtocalculatethediameterofaplanet.EiseEisinga(1744-1828)builttheoldeststillworkingplanetariumintheworld.Inthe19thand20thcenturyDutchastronomerscontinuedtoplayaleadingrole.FrederikKaiser(1808-1872)calculatedtherotationtimeofMarsandbecameaninternationallyacknowledgedexpertonastronomicalposition-finding.WillemJulius(1860-1925)wasoneofthefoundersofmodernsolarphysicsresearch.WillemdeSitter(1872-1934)wasthefirsttodevelopacosmologicalmodelofanexpandinguniverse.DeSitter’sstudentAdriaanBlaauw(1914-2010)becameworldEISEEISINGA,BUILTTHEOLDESTSTILLWORKINGPLANETARIUMINTHEWORLD

49ADRIAANBLAAUW,EUROPEANSOUTHERNOBSERVATORYINCHILEAuthor:ESO/H.H.Heyerfamousforhisstudyofyoung,hotstarsandplayedanimportantroleinestablishingtheEuropeanSouthernObservatoryinChile.ThenewobservatoryofGroningenUniversity(openedin2008)isnamedafterhim.ThenameofGerardPeterKuiper(1905-1973),whoundertookgamechangingstudiesofthemoonanddiscoveredthemoonsMiranda(Uranus)andNereid(Neptunus)isimmortalizedbytheKuiperBelt,adiscofcometsatarelativelyshortAuthor:Gelderen,Hugovan/AnefoGERARDPETERKUIPER,‘KUIPERBELT’distancefromthesun.TheOortcloudhasbeennamedafterJanH.Oort(1900-1992)whosuggestedcometscomefromasphericalshellsurroundingthesolarsystem.Oortisoneofthepioneersofradioastronomy,provedthemilkywayisafastrotatingdisc

50CHRISTIAANVANDERKLAAUWDUTCHASTRONOMERSAuthor:JoopvanBilsenJANH.OORT,PROVEDTHEMILKYWAYISAFASTROTATINGDISCWITHTWOSPIRALARMSwithtwospiralarmsandcalculatedthecentreofthemilkywaytobeintheSagittariusconstellation.BartJanBok(1906-1983)suggestedin1947thatsmalldarkglobulesofinterstellargasanddustwereimplodingontheirgainedhisreputationwithstudiesoftheformationandevolutionofcompactobjectssuchasneutronstarsandblackholes.MaartenSchmidt(1929)discoveredthedistancebetweenearthandthequasars.waytoformnewstars.TheglobuleswerelaternamedBokGlobules.TomGehrels(1925-2010)discoveredthousandsofplanetoidsandcomets,workingcloselytogetherwithfellowDutchmanKeesvanHoutenandhiswifeIngrid.HewasoneoftheinitiatorsoftheSpacewatchproject.HenkvandeHulst(1918-2000)wasoneoftheteammembersthatchartedneutralhydrogeninourmilkywaysystem,establishingitsspiralstructure.EdvandenHeuvel(1940)AndthentherearetheDutchphysicistswhohavemadeimportantcontributionstoastronomy,suchas1902NobelPrizewinnersPieterZeemanandHendrikLorentzwhodevelopedthetheoryofelectromagneticradiation(aprecursortothetheoryofspecialrelativityfromEinstein).JohannesvanderWaalswasawardedthe1910NobelPrizeinphysicsforhisoutstandingwork

CHRISTIAANVANDERKLAAUWDUTCHASTRONOMERS51HEIKEKAMERLINGONNES,NOBELPRIZEWINNERFORPRODUCINGLIQUIDHELIUMontheequationofstateforgasesandliquids.HeikeKamerlingOnnes(theinitiatoroftheinstrumentmakingschoolthattaughtChristiaanvanderKlaauwhisart)receivedthe1913NobelPrizeforproducingliquidhelium.NicolaasBloembergenwonthe1981NobelPrizeinphysicsforhisworkinnonlinearoptics.AndtheNetherlandscontinuetoproducenewstarsinthefieldofastronomy,thankstoexcellentuniversitiesthatoftenhavebeenteachingastronomyformanycenturies.ChristiaanvanderKlaauwAstronomicalWatcheswouldnotexistwithoutthismagnificentheritage.CVDKVENUS

CHRISTIAANVANDERKLAAUWTHEATELIERInthemodernatelierofChristiaanvanderKlaauwAstronomicalWatchesinthecityNaarden-TheNetherlands,everywatchismadewithgreatcareandpassion.Themechanicalmasterpieces,fromthe‘Planetarium’tothe‘Orion’arealldesignedandmanufacturedinthisatelier.Withunprecedentedprecision,themastersofChristiaanvanderKlaauwmakeeverywatch-onebyone-byhand.Ouratelierisofficiallylistedas‘HauteHorlogerie’ontheWhitePaperlistoftheFondationdelaHauteHorlogerie(FHH)inSwitzerland.Only64watchbrandscanclaimthetermof‘hautehorlogerie’.

ThemaincharacteristicofthewatchesmadebyChristiaanvanderKlaauwistheastronomicalcomplication.Everywatchhasoneormorecomplicationsthatoriginatefromastronomy.Ourwatchmakersturncomplexastronomicalcomplicationsintoastonishingworksofart.Allthesebeautifultimepiecesaremadewithgreatattentionfordetailandonlythefinestandbestmaterialsareusedforourcollection.Weproduceinsuchsmallquantitiesperyearthateachwatchcanbeseenasalimitededition.Allwatchesarethereforenumbered.In2024wewillcelebrateour50-yearanniversary.Untiltoday,ChristiaanvanderKlaauwAstronomicalWatchesistheonlyatelierintheworldthatiscompletelydevotedtothedesignandtheproductionofexclusive,hand-madeastronomicalwatches.

58CHRISTIAANVANDERKLAAUWTHECVDKSIGNATURECVDKLOGO(ZONNENKLAAUW,SUNWITH12CLAWS),ONTHE12O’CLOCKPOSITIONINDEXESABOVETHEHORIZONTHECVDKSIGNATURERAYSORSTARRYDIALASTRONOMICALCOMPLICATIONONTHE6O’CLOCKPOSITIONROUNDCASE,CVDKLOGOENGRAVEDONTHELEFTSIDETRANSPARANTCASEBACKWITHABEAUTIFULLYCRAFTEDROTOR

COLLECTIONOFASTRONOMICALMASTERPIECES61COLLECTIONOFASTRONOMICALMASTERPIECESSpacemaybewithoutlimits,butthenumberofwatchesweproduceforthiscollectioncertainlyislimited.Theyofferclassicastronomicalcomplications,alldesignedandhand-madeinourownworkshop,butalsofeatureinnovativewaystoshowthephasesofthemoon,thepositionoftheplanetsandtheheightofthesuninrelationtothehorizon.Itisthisbreathtakingcombinationoftraditionalwatchmakingwithtimelessdesignthatgiveseachwatchinthiscollectionitsinimitablebeauty.

62COLLECTIONOFASTRONOMICALMASTERPIECESPLANETARIUMTHEMASTERPIECEPLANETARIUMThisistheultimatewaytocarrytheuniversecloselytoyourheart.Ourin-housedesignedmodulegivesyouthesmallestmechanicalheliocentricplanetariumintheworld.ItdisplaysrealtimethesolarorbitsofMercury,Venus,Earth,Mars,JupiterandSaturn.Italsoshowsyoutheminutes,hours,dateandmonth.Theresultisamagnificentspectaclethatcontinuestofascinateinallitscomplexmechanicalbeauty.

COLLECTIONOFASTRONOMICALMASTERPIECESPLANETARIUM63

COLLECTIONOFASTRONOMICALMASTERPIECESPLANETARIUM65Thisisastronomicalwatchmakingatthehighestlevel,intricatelydesignedandexecuted.OurPlanetariumisoneofthemostcomplicatedwatchesinourcollection,afittingtributetothegrandmastersofplanetariumdesignsuchasNicolaasCopernicus,JohannesKepler,ChristiaanHuygensandEiseEisinga.

TIMEOFFULLORBITOFMARSAROUNDTHESUN686.98DAYSTIMEOFFULLORBITOFMERCURYAROUNDTHESUN87.97DAYSTIMEOFFULLORBITOFEARTHAROUNDTHESUN365.24DAYSTIMEOFFULLORBITOFJUPITERAROUNDTHESUN11.86YEARS

TIMEOFFULLORBITOFSATURNAROUNDTHESUN29.46YEARSTIMEOFFULLORBITOFVENUSAROUNDTHESUN224.70DAYS

68COLLECTIONOFASTRONOMICALMASTERPIECESPLANETARIUMCVDKPLANETARIUMCKPT3304CVDKPLANETARIUMCKPT3344CVDKPLANETARIUMCKPT1124Eachmodelisalsoavailablewithadiamondsetbezel.Movement:CVDK7386,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKPlanetariummodule.Functions:Hours,minutes,complication;date,month,Planetarium;thewatchisequippedwiththesmallestmechanicalPlanetariumintheworld,showingtheorbitsofMercury,Venus,Earth,Mars,JupiterandSaturnaroundtheSun.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Aventurineglass(goldfluss)creatingastarfilledskywithwhiterhodiumplatedindexes,rhodiumplatedPlanetariumwithcolouredSunandEarth.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.Movement:CVDK7386,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKPlanetariummodule.Functions:Hours,minutes,complication;date,month,Planetarium;thewatchisequippedwiththesmallestmechanicalPlanetariumintheworld,showingtheorbitsofMercury,Venus,Earth,Mars,JupiterandSaturnaroundtheSun.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Blackwithwhiterhodiumplatedindexes,rhodiumplatedPlanetariumwithcolouredSunandEarth.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.Movement:CVDK7386,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKPlanetariummodule.Functions:Hours,minutes,complication;date,month,Planetarium;thewatchisequippedwiththesmallestmechanicalPlanetariumintheworld,showingtheorbitsofMercury,Venus,Earth,Mars,JupiterandSaturnaroundtheSun.Case:Rosegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithblueindexes,rhodiumplatedPlanetariumwithcolouredSunandEarth.Strap:Blackleather.Buckle:Logoengravedrosegoldbuckle.

COLLECTIONOFASTRONOMICALMASTERPIECESPLANETARIUM69CVDKPLANETARIUMCKPT7724Movement:CVDK7386,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKPlanetariummodule.Functions:Hours,minutes,complication;date,month,Planetarium;thewatchisequippedwiththesmallestmechanicalPlanetariumintheworld,showingtheorbitsofMercury,Venus,Earth,Mars,JupiterandSaturnaroundtheSun.Case:Whitegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithblueindexes,rhodiumplatedPlanetariumwithcolouredSunandEarth.Strap:Blackleather.Buckle:Logoengravedwhitegoldbuckle.CVDKPLANETARIUMCKPT2225Movement:CVDK7386,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKPlanetariummodule.Functions:Hours,minutes,complication;date,month,Planetarium;thewatchisequippedwiththesmallestmechanicalPlanetariumintheworld,showingtheorbitsofMercury,Venus,Earth,Mars,JupiterandSaturnaroundtheSun.Case:Platinum,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithblueindexes,rhodiumplatedPlanetariumwithcolouredSunandEarth.Strap:Brownleather.Buckle:Logoengravedplatinumbuckle.CVDKPLANETARIUMROTORTherotorisengravedwithplanets,starsandthe‘Sunwith12Claws’,thelogoofChristiaanvanderKlaauw.

ATRIBUTETOMARS...MankindhasalwaysbeenfascinatedwiththemysteriesofourUniverse.ChristiaanvanderKlaauwproudlypresentsabeautifultributetoourplanetMars,thefourthplanetinourSolarSystem.ThemesmerizingCVDKPlanetariumDunesofMarsfeaturesthesmallestmechanicalPlanetariumintheworld,madewithaspeciallycreatedCVDKsignatureAventurineGlassdialinred-portrayingMarsitsredsandygrounds.Mars,knownastheRedPlanet,isamostlydryanddustyplace.Avarietyofcolorscanbeseenonthesurface,includingthepredominantrustyredtheplanetisknownfor.Thisrustyredcolorisironoxide,justliketherustthatformshereonEarthwhenironoxidizes-ofteninthepresenceofwater.LikeEarth,Marshasseasons,polaricecaps,volcanoes,canyons,andweather.Marsisoneoftheeasiestplanetstospotinthenightsky-itlookslikeabrightredpointoflight.IthastwomoonsnamedPhobosandDeimosandonedayonMarstakesalittleover24hours.ItmakesacompleteorbitaroundtheSun(ayearinMartiantime)in687Earthdays,whichcanbeseeninrealtimeonourPlanetariumdial.Despitebeinginhospitabletohumans,roboticexplorers-likeNASA’snewPerseverancerover-areservingaspathfinderstoeventuallygethumanstothesurfaceofthismysteriousandintriguingRedPlanet.Source:https://www.jpl.nasa.gov/edu/teach/activity/exploring-the-colors-of-marsSource:https://solarsystem.nasa.gov/planets/mars/overview/

72COLLECTIONOFASTRONOMICALMASTERPIECESPLANETARIUMXCVDKPLANETARIUMCKPM3305DunesofMarsMovement:CVDK7386,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKPlanetariummodule.Functions:Hours,minutes,complication;date,month,Planetarium;thewatchisequippedwiththesmallestmechanicalPlanetariumintheworld,showingtheorbitsofMercury,Venus,Earth,Mars,JupiterandSaturnaroundtheSun.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:AventurineGlassinredwithwhiterhodiumplatedindexesandhands,rhodiumplatedPlanetariumwithcolouredSun,EarthandMars.Strap:Brownleather.Buckle:Logoengravedsteelfoldingclasp.LimitedEdition:6watchesinhighqualitysteel.CVDKPLANETARIUMCKPM1105DunesofMarsMovement:CVDK7386,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKPlanetariummodule.Functions:Hours,minutes,complication;date,month,Planetarium;thewatchisequippedwiththesmallestmechanicalPlanetariumintheworld,showingtheorbitsofMercury,Venus,Earth,Mars,JupiterandSaturnaroundtheSun.Case:Rosegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:AventurineGlassinredwithwhiterhodiumplatedindexes,rosegoldplatedhands,rhodiumplatedPlanetariumwithcolouredSun,EarthandMars.Strap:Brownleather.Buckle:Logoengravedrosegoldbuckle.LimitedEdition:6watchesinrosegold.CVDKPLANETARIUMCKPM7705DunesofMarsMovement:CVDK7386,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKPlanetariummodule.Functions:Hours,minutes,complication;date,month,Planetarium;thewatchisequippedwiththesmallestmechanicalPlanetariumintheworld,showingtheorbitsofMercury,Venus,Earth,Mars,JupiterandSaturnaroundtheSun.Case:Whitegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:AventurineGlassinredwithwhiterhodiumplatedindexesandhands,rhodiumplatedPlanetariumwithcolouredSun,EarthandMars.Strap:Brownleather.Buckle:Logoengravedwhitegoldbuckle.LimitedEdition:6watchesinwhitegold.

74COLLECTIONOFASTRONOMICALMASTERPIECESREALMOONJOURETHEMASTERPIECEREALMOONJOUREThisclassicalbeautyrepresentsaspecialinterpretationofourrotating3-dimensionalrealmoonindicatingthetruemoonphase.Themoonrotatesaroundtheearthevery29,5305889days.Ourhand-made3Dminiaturemoonindicatesthemoonphasesoaccuratelythatitdeviatesonlyonedayin11,000years.Itisthemostaccurate3Dmoonphaseindicatoreverincorporatedinamechanicalwatchmovement.Thewatchalsoshowsthetime.Andwhoneedsmore?

COLLECTIONOFASTRONOMICALMASTERPIECESREALMOONJOURE75

78COLLECTIONOFASTRONOMICALMASTERPIECESREALMOONJOUREEachmodelisalsoavailablewithadiamondsetbezel.CVDKREALMOONJOURECKRJ3324Movement:CVDK7382,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonJouremodule.Functions:Hours,minutes,complication;3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithwhiterhodiumplatedindexes.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.CVDKREALMOONJOURECKRJ3344Movement:CVDK7382,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonJouremodule.Functions:Hours,minutes,complication;3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Blackwithwhiterhodiumplatedindexes.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.CVDKREALMOONJOURECKRJ3304Movement:CVDK7382,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonJouremodule.Functions:Hours,minutes,complication;3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Aventurineglass(goldfluss)creatingastarfilledskywithwhiterhodiumplatedindexes.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.

COLLECTIONOFASTRONOMICALMASTERPIECESREALMOONJOURE79CVDKREALMOONJOURECKRJ3894Movement:CVDK7382,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonJouremodule.Functions:Hours,minutes,complication;3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Highqualitysteel,diamondsetinhighqualitysteelbezel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Mother-of-pearlwithblueindexes.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.CVDKREALMOONJOURECKRJ1124Movement:CVDK7382,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonJouremodule.Functions:Hours,minutes,complication;3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Rosegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithblueindexes.Strap:Blackleather.Buckle:Logoengravedrosegoldbuckle.CVDKREALMOONJOURECKRJ7724Movement:CVDK7382,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonJouremodule.Functions:Hours,minutes,complication;3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Whitegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithblueindexes.Strap:Blackleather.Buckle:Logoengravedwhitegoldbuckle.

WHENTHEUNIVERSEMEETSTHEMOSTACCURATE3DMOONPHASEINTHEWORLD...Amagicalgatheringbetweentheoldestknownmagmafromspaceandthemostaccurate3Dmoonphaseintheworld.ChristiaanvanderKlaauwproudlypresentstheCVDKRealMoonJoureGreenMeteorite.MeteoritesthatfalltoEarthrepresentsomeoftheoriginal,diversematerialsthatformedplanetsbillionsofyearsago.OurbeautifulHauteHorlogerieRealMoonJourecontainsaspeciallymadeGreenMeteoritedialbearingthemostaccurate3Dmoonphaseintheworldeverincorporatedinamechanicalwatch.

82COLLECTIONOFASTRONOMICALMASTERPIECESREALMOONJOURETHEMASTERPIECEREALMOONJOUREGreenMeteoriteEachmodelisalsoavailablewithadiamondsetbezel.CVDKREALMOONJOURECKRJ33G4GreenMeteoriteMovement:CVDK7382,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonJouremodule.Functions:Hours,minutes,complication;3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:GreenMeteoritewithwhiterhodiumplatedindexes.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.CVDKREALMOONJOURECKRJ11G4GreenMeteoriteMovement:CVDK7382,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonJouremodule.Functions:Hours,minutes,complication;3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Rosegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:GreenMeteoritewithwhiterhodiumplatedindexesandrosegoldplatedhands.Strap:Blackleather.Buckle:Logoengravedrosegoldbuckle.CVDKREALMOONJOURECKRJ77G4GreenMeteoriteMovement:CVDK7382,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonJouremodule.Functions:Hours,minutes,complication;3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Whitegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:GreenMeteoritewithwhiterhodiumplatedindexes.Strap:Blackleather.Buckle:Logoengravedwhitegoldbuckle.

84COLLECTIONOFASTRONOMICALMASTERPIECESREALMOONTIDESTHEMASTERPIECEREALMOONTIDESTheCVDKRealMoonseries,knownfortheRealMoonJoureandtheRealMoon1980,wasextendedwithanewuniquemasterpiece,theCVDKRealMoonTides.ThiscompletestheRealMoontrilogy.Nexttoarotatingminiaturemoonitcarriesacomplicationshowingyouthesealeveltidesinawaythathasneverbeenseeninamechanicalwatchbefore.TidesaretheriseandfallofsealevelscausedbythecombinedeffectsofgravitationalforcesexertedbytheMoon,Sun,androtationoftheEarth.

COLLECTIONOFASTRONOMICALMASTERPIECESREALMOONTIDES85

COLLECTIONOFASTRONOMICALMASTERPIECESREALMOONTIDES87Therearemultipletypesofseatides.Inmostlocationsyouwillfindthe‘principallunarsemi-diurnal’seatide.Itsperiodforoneriseandfallofthesealevelisabout12hours,25minutesand14seconds.Wavesmoveupanddowninaspecialwindowtomakethisbeautifulphenomenonvisible.Atthe6o’clockpositionouruniquerotating3-dimensionalrealmoon-indicatingthetruemoonphase-isshown.Themoonrotatesaroundtheearthevery29,5305889days.Ourhand-made3Dminiaturemoonindicatesthemoonphasesoaccuratelythatitdeviatesonlyonedayin11,000years.Itisthemostaccurate3Dmoonphaseintheworldeverincorporatedinamechanicalwatch.

88COLLECTIONOFASTRONOMICALMASTERPIECESREALMOONTIDESCVDKREALMOONTIDESCKRS3324CVDKREALMOONTIDESCKRS3304CVDKREALMOONTIDESCKRS1124Eachmodelisalsoavailablewithadiamondsetbezel.Movement:CVDK7383,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonTidesmodule.Functions:Hours,minutes,complication;Tidesindicator,3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithblueindexes.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.Movement:CVDK7383,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonTidesmodule.Functions:Hours,minutes,complication;Tidesindicator,3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Aventurineglass(goldfluss)creatingastarfilledskywithwhiterhodiumplatedindexes.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.Movement:CVDK7383,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonTidesmodule.Functions:Hours,minutes,complication;Tidesindicator,3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Rosegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithblueindexes.Strap:Blackleather.Buckle:Logoengravedrosegoldbuckle.

COLLECTIONOFASTRONOMICALMASTERPIECESREALMOONTIDES89CVDKREALMOONTIDESCKRS7804Movement:CVDK7383,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonTidesmodule.Functions:Hours,minutes,complication;Tidesindicator,3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Whitegold,diamondsetinwhitegoldbezel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Aventurineglass(goldfluss)creatingastarfilledskywithwhiterhodiumplatedindexes.Strap:Blackleather.Buckle:Logoengravedwhitegoldbuckle.CVDKREALMOONTIDESCKRS7725Movement:CVDK7383,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoonTidesmodule.Functions:Hours,minutes,complication;Tidesindicator,3Dmoonphase;thewatchisequippedwiththemostaccurate3Dmoonphaseintheworld.Case:Whitegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithblueindexes.Strap:Brownleather.Buckle:Logoengravedwhitegoldbuckle.CVDKREALMOONTIDESROTORTherotorisengravedwithplanets,starsandthe‘Sunwith12Claws’,thelogoofChristiaanvanderKlaauw.

92COLLECTIONOFASTRONOMICALMASTERPIECESREALMOON1980THEMASTERPIECEREALMOON1980Takingcenter-stageatthe6o’clockposition,theunique3-dimensionalrealmoonshowsthemoonphaseinaveryaccurateway.Butfromatechnicalviewpointthemechanicalindicationofthedeclinationofthesun,plusthesolarandlunareclipses,isextremelyinterestingtoo.Thedeclinationofthesunisshownatthe12o’clockposition.TheheightoftheSuninrelationtothehorizoncanbereadbymeansofafinemovingsymbolofthesun,theChristiaanvanderKlaauwbrandlogo.Atthestartofthesummer,thesunsymbolisatitshighestpositionandatthestartofwinter,thesun

COLLECTIONOFASTRONOMICALMASTERPIECESREALMOON198093

COLLECTIONOFASTRONOMICALMASTERPIECESREALMOON198095symbolisatitslowestposition.The3o’clockpositionisreservedfortheEclipsehand.WhentheEclipsehandmoveswithintheindicationmarks,thereisaneclipseoftheSunortheMoonsomewhereontheEarth.TheRealMoon1980alsoshowsthedate(dayandmonth)atthe9o’clockposition.Withthisverycomplicatedmasterpiece-thatwasawardedEuropeanWatchoftheYearin2012-ChristiaanvanderKlaauwAstronomicalWatchesprovesonceagainit’sauthorityonastronomicalwatches.

96COLLECTIONOFASTRONOMICALMASTERPIECESREALMOON1980Eachmodelisalsoavailablewithadiamondsetbezel.CVDKREALMOON1980CKRL3344Movement:CVDK7384,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoon1980module.Functions:Hours,minutes,complication;date,month,3Dmoonphase,declinationofthesun,eclipsehand;indicatesbothsolarandlunareclipse.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Blackwithwhiterhodiumplatedindexes.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.CVDKREALMOON1980CKRL3304Movement:CVDK7384,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoon1980module.Functions:Hours,minutes,complication;date,month,3Dmoonphase,declinationofthesun,eclipsehand;indicatesbothsolarandlunareclipse.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Aventurineglass(goldfluss)creatingastarfilledskywithwhiterhodiumplatedindexes.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.CVDKREALMOON1980CKRL1124Movement:CVDK7384,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoon1980module.Functions:Hours,minutes,complication;date,month,3Dmoonphase,declinationofthesun,eclipsehand;indicatesbothsolarandlunareclipse.Case:Rosegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithblueindexes.Strap:Blackleather.Buckle:Logoengravedrosegoldbuckle.

97CVDKREALMOON1980CKRL7725Movement:CVDK7384,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKRealMoon1980module.Functions:Hours,minutes,complication;date,month,3Dmoonphase,declinationofthesun,eclipsehand;indicatesbothsolarandlunareclipse.Case:Whitegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithblueindexes.Strap:Brownleather.Buckle:Logoengravedwhitegoldbuckle.CVDKREALMOON1980ROTORTherotorisengravedwithplanets,starsandthe‘Sunwith12Claws’,thelogoofChristiaanvanderKlaauw.

100COLLECTIONOFASTRONOMICALMASTERPIECESTITANPERPETUALTHEMASTERPIECETITANPERPETUALTheCVDKTitanPerpetualisatributetotheDutchastronomerMr.ChristiaanHuygenswhodiscoveredtheringsandthelargestmoonofSaturnnamed‘Titan’in1655.Thisuniversalgeniuswasalsoofgreatimportancetothedevelopmentofclocksandwatcheswithhisinventionofthependulummovement.Itisequippedwithaperpetualcalendarmoduleandabeautifulmoonphaseindicatormadeoutofmotherofpearlandaventurineglass.Theperpetualcalendaralwaysshowsyouthecorrectnumberofdaysofthemonth,evenadisplayoftheleapyearisintegrated.Furthermoreitcarriesahand-madeChristiaanvanderKlaauwmicro-rotor.Thankstothespecialpositioningofthismicro-rotorauniqueandclearviewofthetechnicalmovementofthewatchisprovided.

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102COLLECTIONOFASTRONOMICALMASTERPIECESTITANPERPETUALCVDKTITANPERPETUALCKTT3324Movement:CVDK8801,automaticwinding,29jewels,power-reserve42hourmax.Functions:Hours,minutes,complication;day,date,month,leapyearindicator,moonphase.Case:Highqualitysteel,ø44mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithblueindexes,moonphasemadeoutofMotherofpearlandAventurineglass(goldfluss).Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.CVDKTITANPERPETUALROTORTherotorisanengravedmicro-rotor.Thesapphirecrystalcase-backhasabeautifulengravingoftheuniversalgeniusMr.ChristiaanHuygens.Eachmodelisalsoavailablewithadiamondsetbezel.

TheTitanPerpetualisatributetotheDutchastronomerChristiaanHuygenswhodiscoveredtheringsandthelargestmoonofSaturnnamed‘Titan’in1655.Thisuniversalgeniuswasalsoofgreatimportancetothedevelopmentofclocksandwatcheswithhisinventionofthependulummovement.

COLLECTIONOFTHESTARS105COLLECTIONOFTHESTARSLeaveittoChristiaanvanderKlaauwtotakeastronomicalwatchesintothefuture.Inthiscollectionyouwillfindwatchesthatturnastronomicalcomplicationsintoastonishingworksofart.Aretrogrademoonphaseindication,acelestialplanisphere,adazzlingshowofthemoon’spositioninrelationtothesun,ithasallbeenmadepossiblebythetalentedwatchmakersatChristiaanVanderKlaauwAstronomicalWatches.

106COLLECTIONOFTHESTARSORIONCOMPLICATIONORIONTheOrionisastrikingexampleofthewaywehavebeenintegratingastronomicalcomplicationsanddesign.Itisequippedwithaso-calledplanisphere,arotatingstarryskythatturnsaroundevery23hours,56minutesand4.0916seconds(siderealday),givingyouthecorrectviewofthestarsandconstellationsaboveyouasseenfrommostpositionsonthenorthernhemisphere.

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108COLLECTIONOFTHESTARSORIONCVDKORIONCKOR3326Movement:CVDK1072,automaticwinding,25jewels,power-reserve;42hourmax.,complication;CVDKOrionmodule.Functions:Hours,minutes,seconds,complication;rotatingcelestialmap(Planisphere)withZodiacsignindicator.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithbluecelestialmapandblueindexes.Strap:Blueleather.Buckle:Logoengravedsteelfoldingclasp.CVDKORIONCKOR1126Movement:CVDK1072,automaticwinding,25jewels,power-reserve;42hourmax.,complication;CVDKOrionmodule.Functions:Hours,minutes,seconds,complication;rotatingcelestialmap(Planisphere)withZodiacsignindicator.Case:Rosegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithbluecelestialmapandblueindexes.Strap:Blueleather.Buckle:Logoengravedrosegoldbuckle.CVDKORIONROTORTherotorisbasedonthe‘Sunwith12Claws’,thelogoofChristiaanvanderKlaauw.Eachmodelisalsoavailablewithadiamondsetbezel.

110COLLECTIONOFTHESTARSHYPERNOVACOMPLICATIONHYPERNOVAThebeautifulCVDKHypernovacombinesafullchronographwithaday/nightindication,aningeniousdatedisplayandabeautifulsuperluminovamoonphaseindication.Thesuperluminovamoonphasecanbereadatthe6o’clockposition.WhentheMoonisleftofthecentre,itisinitsfirstquarter.WhentheMoonisinthecentre,itisfullMoonandrightofthecentre,itisinitslastquarter.IftheMoonisnotvisible,itisnewMoon.TheCVDKHypernovawasthefirstwatchfeaturingourextra-largecase,measuring44mmindiameter.

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112COLLECTIONOFTHESTARSHYPERNOVACVDKHYPERNOVACKHN3326Movement:CVDK7759,automaticwinding,25jewels,power-reserve;48hourmax.Functions:Hours,minutes,complication;smallseconds,day/nightindication,day,date,month,superluminovamoonphase,chronograph;12-hourcounter,30-minutecounter,secondscounter.Case:Highqualitysteel,ø44mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithblueindexes,superluminova.Strap:Blueleather.Buckle:Logoengravedsteelfoldingclasp.CVDKHYPERNOVACKHN3366Movement:CVDK7759,automaticwinding,25jewels,power-reserve;48hourmax.Functions:Hours,minutes,complication;smallseconds,day/nightindication,day,date,month,superluminovamoonphase,chronograph;12-hourcounter,30-minutecounter,secondscounter.Case:Highqualitysteel,ø44mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Stonewashedbluewithwhiterhodiumplatedindexes,superluminova.Strap:Blueleather.Buckle:Logoengravedsteelfoldingclasp.CVDKHYPERNOVACKHN3344Movement:CVDK7759,automaticwinding,25jewels,power-reserve;48hourmax.Functions:Hours,minutes,complication;smallseconds,day/nightindication,day,date,month,superluminovamoonphase,chronograph;12-hourcounter,30-minutecounter,secondscounter.Case:Highqualitysteel,ø44mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Blackwithwhiterhodiumplatedindexes,superluminova.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.

COLLECTIONOFTHESTARSHYPERNOVA113CVDKHYPERNOVACKHN3335Movement:CVDK7759,automaticwinding,25jewels,power-reserve;48hourmax.Functions:Hours,minutes,complication;smallseconds,day/nightindication,day,date,month,superluminovamoonphase,chronograph;12-hourcounter,30-minutecounter,secondscounter.Case:Highqualitysteel,ø44mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Greywithwhiterhodiumplatedindexes,superluminova.Strap:Brownleather.Buckle:Logoengravedsteelfoldingclasp.CVDKHYPERNOVAROTORTherotorisbasedonthe‘Sunwith12Claws’,thelogoofChristiaanvanderKlaauw.

116COLLECTIONOFTHESTARSARIADNECOMPLICATIONARIADNEClassicastronomicalwatchmakingatitsverybest,combinedwithasportydesign.Thischronographwithseconds,minuteandhourcounterisaccompaniedbyafulldateindicationand24hourindicator.ThepositionoftheMooncanbereadatthe6o’clockposition.WhentheMoonisleftofcentre,itisinitsfirstquarter.WhentheMoonisinthecentre,itisfullMoonandrightofcentre,itisinitslastquarter.IftheMoonisnotvisible,youseeabeautifulstarryskyinthewindow,itisnewMoon.

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118COLLECTIONOFTHESTARSARIADNECVDKARIADNECKAR3335Movement:CVDK7758,automaticwinding,25jewels,power-reserve;48hourmax.Functions:Hours,minutes,smallseconds,24-hourindication,day,date,month,moonphase,chronograph;12-hourcounter,30-minutecounter,secondscounter.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Silverwithblueindexes.Strap:Brownleather.Buckle:Logoengravedsteelfoldingclasp.CVDKARIADNECKAR3366Movement:CVDK7758,automaticwinding,25jewels,power-reserve;48hourmax.Functions:Hours,minutes,smallseconds,24-hourindication,day,date,month,moonphase,chronograph;12-hourcounter,30-minutecounter,secondscounter.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Navybluewithwhiterhodiumplatedindexes.Strap:Blueleather.Buckle:Logoengravedsteelfoldingclasp.Eachmodelisalsoavailablewithadiamondsetbezel.

COLLECTIONOFTHESTARSARIADNE119CVDKARIADNECKAR3344Movement:CVDK7758,automaticwinding,25jewels,power-reserve;48hourmax.Functions:Hours,minutes,smallseconds,24-hourindication,day,date,month,moonphase,chronograph;12-hourcounter,30-minutecounter,secondscounter.Case:Highqualitysteel,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Anthracitewithwhiterhodiumplatedindexes.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.CVDKARIADNEROTORTherotorisbasedonthe‘Sunwith12Claws’,thelogoofChristiaanvanderKlaauw.

120COLLECTIONOFTHESTARSLADYORIONSTARDUSTTHECVDKLADYORIONSTARDUSTTheCVDKLadyOrionStardusthasourfamoussignaturedialmadefromAventurineGlasscreatingastarfilledsky.WeareknownworldwideforourbeautifulandmesmerizingAventurineGlassdials.WhyisanAventurineGlassdialsospecial?Itchangesthroughlight.Itcanbesubtleanddark,itcanbealittlesparkly,anditcanbejustamazinglyalivewithanincredibledepth,creatingatruealmostthree-dimensionalstarrysky.Itchangesconstantlythroughlightonyourwrist.

AVAILABLEONREQUEST:AFULLDIAMONDSETCASEANDBEZEL

122COLLECTIONOFTHESTARSLADYORIONSTARDUSTCVDKLADYORIONSTARDUSTCKOD3304CVDKLADYORIONSTARDUSTCKOD3804CVDKLADYORIONSTARDUSTCKOD1104Movement:CVDK2868,automaticwinding,25jewels,power-reserve;38hourmax.,Case:Highqualitysteel,ø32mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Aventurineglass(goldfluss)creatingastarfilledsky.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.Movement:CVDK2868,automaticwinding,25jewels,power-reserve;38hourmax.,Case:Highqualitysteel,diamondsetinhighqualitysteelbezel,ø32mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Aventurineglass(goldfluss)creatingastarfilledsky.Strap:Blackleather.Buckle:Logoengravedsteelfoldingclasp.Movement:CVDK2868,automaticwinding,25jewels,power-reserve;38hourmax.,Case:Rosegold,ø32mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Aventurineglass(goldfluss)creatingastarfilledsky.Strap:Blackleather.Buckle:Logoengravedrosegoldbuckle.Eachmodelisalsoavailablewithafulldiamondsetcaseandbezel.

COLLECTIONOFTHESTARSLADYORIONSTARDUST123CVDKLADYORIONSTARDUSTCKOD1804CVDKLADYORIONSTARDUSTCKOD7704CVDKLADYORIONSTARDUSTCKOD7804Movement:CVDK2868,automaticwinding,25jewels,power-reserve;38hourmax.,Case:Rosegold,diamondsetinrosegoldbezel,ø32mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Aventurineglass(goldfluss)creatingastarfilledsky.Strap:Blackleather.Buckle:Logoengravedrosegoldbuckle.Movement:CVDK2868,automaticwinding,25jewels,power-reserve;38hourmax.,Case:Whitegold,ø32mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Aventurineglass(goldfluss)creatingastarfilledsky.Strap:Blackleather.Buckle:Logoengravedwhitegoldbuckle.Movement:CVDK2868,automaticwinding,25jewels,power-reserve;38hourmax.,Case:Whitegold,diamondsetinwhitegoldbezel,ø32mm,sapphirecrystal,sapphirecrystalcase-back.Dial:Aventurineglass(goldfluss)creatingastarfilledsky.Strap:Blackleather.Buckle:Logoengravedwhitegoldbuckle.

COLLECTIONOFTHEATELIER125COLLECTIONOFTHEATELIERIfyouhaveeverdreamtofowningacompletelyuniqueastronomicalwatch,theCollectionoftheAteliermakesthisdreamcometrue.Yourpersonalwishesareusedasagridforourwatchmakerstocomposeyourpersonalwatch:thematerials,complications,dials,rotorsandfinishmayallbeselectedinaccordancewithyourpersonalwishes.EveryChristiaanvanderKlaauwastronomicalwatchisrare,butwiththiscollectionyouwillhaveachancetoownauniqueone.

126COLLECTIONOFTHEATELIERCUSTOMMADECVDKREALMOONJOUREDIAMONDMOONCustomMadeCVDKREALMOONJOURESOUTHAMERICASKULLCustomMadeCVDKPLANETARIUMZODIACSIGNSAGITTARIUSCustomMadeCVDKREALMOONTIDESINTERSCALDESEDITIONCustomMadeCVDKREALMOONJOUREZODIACSIGNSCORPIOCustomMade

COLLECTIONOFTHEATELIER127EXAMPLESOFCUSTOMMADETIMEPIECESANDPIECEUNIQUESCVDKVENUSCustomMadeCVDKREALMOONSTELLANEBULACustomMadeCVDKPLANETARIUMGREENMETEORITECustomMadeCVDKASTROLABIUMCustomMadeCVDKREALMOONJOURERUSHHOURATTHEMOONCustomMade

128THECVDKWATCHCONFIGURATORCreateandorderyourowndesignedtimepieceWITHTHECVDKWATCHCONFIGURATOREveryChristiaanvanderKlaauwwatchisrare,butwithourCVDKWatchConfiguratoryouwillhavetheuniquechancetoownyourownbespokeastronomicalwatch.YoucancreatenotonlyabespokeCVDKwatchbutevencreateCVDKwatchcombinationsthathaveneverbeenmadeatouratelierbefore.ChoosingfromthesmallestmechanicalPlanetariumintheworldtothemostaccurate3Dmoonphaseintheworld-andeverythinginbetween.Pickyourastronomicalcomplicationandstarttocomposeandcreateyourownpersonalwatchwiththecase,bezel,dial,hands,claspandstrap.WhatwouldyourultimateCVDKtimepiecelooklike?Tryandenjoy!www.configurator.klaauw.com

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132WINNINGTHEGPHG

WINNINGTHEGPHG133WINNERWinnerofthemostprestigiouswatchawardintheworld.TheGrandPrixd’HorlogeriedeGenève(GPHG).CalendarandAstronomyWatchPrizeisawardedtoChristiaanvanderKlaauwCVDKPlanetariumEiseEisinga.ItcontainsthesmallestmechanicalPlanetariumintheworld,showingrealtimetheorbitsofMercury,Venus,Earth,Mars,JupiterandSaturnaroundtheSun.

134WINNINGTHEGPHGWINNER

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136THEOLDESTWORKINGPLANETARIUMINTHEWORLDMEETSTHESMALLESTMECHANICALPLANETARIUMCEILINGOFTHEROYALEISEEISINGAPLANETARIUM

137INTHEWORLD...

138WINNINGTHEGPHGPLANETARIUMEISEEISINGATHEMASTERPIECEPROJECTAmagicalgatheringbetweentheoldestworkingPlanetariumintheworldandthesmallestmechanicalPlanetariumintheworld.ChristiaanvanderKlaauwandtheRoyalEiseEisingaPlanetariumproudlypresenttheCVDKPlanetariumEiseEisingaLimitedEditionwatch.Artandsciencecapturedinanenchantingwayinahand-paintedmasterpiece.Inaverylimitededitionofonly6steel,6bicolor,6whitegold,6rosegoldand6platinumwatches.Eachofthe6watcheswillbearitsownuniqueplanetname.ThisbeautifulHauteHorlogeriemasterpiececontainsthesmallestmechanicalPlanetariumintheworldshowingrealtimetheorbitsofMercury,Venus,Earth,Mars,JupiterandSaturnaroundthesun.

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MR.EISEEISINGA(1744-1828)

WINNINGTHEGPHGPLANETARIUMEISEEISINGA143CVDKPLANETARIUMEiseEisingaLimitedEditionMovement:CVDK7386,automaticwinding,35jewels,twinbarrel,power-reserve;96hourmax.,complication;CVDKPlanetariummodule.Functions:Hours,minutes,complication;date,month,Planetarium;thewatchisequippedwiththesmallestmechanicalPlanetariumintheworld,showingtheorbitsofMercury,Venus,Earth,Mars,JupiterandSaturnaroundtheSun.Case:Rosegold,ø40mm,sapphirecrystal,sapphirecrystalcase-back.Dial:OilpainteddialmadebytheartistGaëlColon,rosegoldplatedindexes.Planetariumwithcustomizedcoloredhandpaintedplanets.Strap:Blackleather.Buckle:Logoengravedrosegoldbuckle.LimitedEdition:6uniquewatchesinsteel,bicolor,rosegold,whitegoldandplatinum.Eachuniquelyengravedwiththenameofoneofthe6planets:Mercury,Venus,Earth,Mars,JupiterorSaturn.CVDKPLANETARIUMROTORTherotorisengravedwithplanets,starsandthe‘Sunwith12Claws’,thelogoofChristiaanvanderKlaauw.Eachcaseisuniquelyengravedwiththenameofoneofthe6planets:Mercury,Venus,Earth,Mars,JupiterorSaturn.

146CHRISTIAANVANDERKLAAUWSERVICE&WARRANTYOURUNIVERSETheAtelierproducesonlyalimitednumberofwatcheseveryyear.Inthisway,theartistsofChristiaanvanderKlaauwAstronomicalWatchescangiveeverywatchtheattentionitdeserves.Thisattentionisreflectedinthebeautyandqualityofthewatch.Allwatchesaremadebyhandandsubjectedtocountlessqualitytests.ChristiaanvanderKlaauwarethereforesoconvincedofthequalityoftheirproducts,thattheyprovideathree-yearwarrantyonthemovementandthecase.

148CHRISTIAANVANDERKLAAUWSERVICE&WARRANTYAllChristiaanvanderKlaauwwatchesaredeliveredinanexclusiveluxuriouswatchbox.FortheCollectionoftheAstronomicalMasterpiecesthewatchboxisalsofittedwithaSwissKubikwinder.Thiswinder,whichcanberemovedfromthebox,willensurethatyourastronomicalcomplicationstaysaccurate.ChristiaanvanderKlaauwAstronomicalWatchesisonlyonsaleatauthorisedretailers.Theseretailershavetomeetstringentrequirementswithrespecttoservice,adviceandexclusivity.Visitourwebsitewww.klaauw.com,tofindoutwhereyoucanfindyourmasterpiece.

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COLLABORATIONWITHVANCLEEF&ARPELSLADYARPELSPLANÉTARIUMIn2018,thelegendaryVanCleef&ArpelsisturningitsgazetowardtheIn2018sky,totheunveillegendaryaversionVanCleefofthe&ArpelsMidnightisturningPlanétarium™itsgazetowardwatchspeciallytheskydesignedtounveilforawomenversion.ofExpressingtheMidnightthePoetryPlanétarium™ofTime®byVanCleef&Arpels,thiscreationonceagainconveysthecelestialwatchspeciallydesignedforwomen.ExpressingthePoetryofTime®balletwithanexclusivenewmodule,developedinSwitzerlandinbyVanCleef&Arpels,thiscreationonceagainconveysthecelestialcollaborationwithChristiaanvanderKlaauw.WhileMercury,Venusballetwithanexclusivenewmodule,developedinSwitzerlandinandEarthrotatearoundthesunattheiractualspeeds,thediamondcollaborationwithChristiaanvanderKlaauw.WhileMercury,VenusMooncompletesitssparklingorbitin29.53days.andEarthrotatearoundthesunattheiractualspeeds,thediamondMooncompletesWinnerofitsthesparklingprestigiousorbitGrandin29.53Prixdaysd’Horlogerie.deGenève(GPHG)in2018inGenevainthecategoryLadies’Complication.

CHRISTIAANVANDERKLAAUWCOLLABORATIONWITHVANCLEEF&ARPELS155VanCleef&ArpelsLADYARPELS™PLANÉTARIUMPOETICCOMPLICATIONSMovement:Self-windingmechanicalmovementwithaChristiaanvanderKlaauwPlanetariummoduledevelopedexclusivelyforVanCleef&Arpels.Functions:Aminiaturerepresentationofthemovementof3planetsandtheMoonaroundthesunandtheirpositionatanygiventime.Mercury,Venus,EarthandtheMoon.Case:38-mmcaseinwhitegoldsetwithdiamonds,bezelsetwithdiamondsandcrownsetwithadiamond.Dial:Aventurine,Suninpinkgold,shootingstarinrhodium-platedgold,Mercuryinpinkmother-of-pearl,Venusingreenenamel,Earthinturquoise,Moonindiamond.Strap:Blueglitteralligatorstrap.VanCleef&ArpelsLADYARPELS™PLANÉTARIUMPOETICCOMPLICATIONSMovement:Self-windingmechanicalmovementwithaChristiaanvanderKlaauwPlanetariummoduledevelopedexclusivelyforVanCleef&Arpels.Functions:Aminiaturerepresentationofthemovementof3planetsandtheMoonaroundthesunandtheirpositionatanygiventime.Mercury,Venus,EarthandtheMoon.Case:38-mmcaseinwhitegoldsetwithdiamonds,bezelsetwithdiamondsandcrownsetwithadiamond.Dial:Aventurine,Suninpinkgold,shootingstarinrhodium-platedgold,Mercuryinpinkmother-of-pearl,Venusingreenenamel,Earthinturquoise,Moonindiamond.Strap:Whitegoldbraceletsetwithdiamonds.

COLLABORATIONWITHVANCLEEF&ARPELSMIDNIGHTPLANÉTARIUMPOETICCOMPLICATIONIn2014thelegendaryVanCleef&ArpelspresentedtheastonishingtimepieceMidnightPlanétariumPoeticComplication™,attheSIHHinGeneva.Thismasterpiecehasaself-windingmechanicalmovementofgreatcomplexity:equippedwithanexclusivePlanetariummoduledevelopedinpartnershipwithChristiaanvanderKlaauwAstronomicalWatches,itcontains396separateparts.

CHRISTIAANVANDERKLAAUWCOLLABORATIONWITHVANCLEEF&ARPELS161VanCleef&ArpelsMIDNIGHTPLANÉTARIUMPOETICCOMPLICATION™Movement:Self-windingmechanicalmovementwithaChristiaanvanderKlaauwPlanetariummoduledevelopedexclusivelyforVanCleef&Arpels.Functions:Aminiaturerepresentationofthemovementofsixplanetsaroundthesunandtheirpositionatanygiventime.Earth,Mercury,Venus,Mars,JupiterandSaturn.Case:Pinkgoldcase,44mmdiameter.Dial:Pinkgold,aventurine,serpentine,chloromelanite,turquoise,redjasper,blueagateandsugilite.Strap:Blackalligatorbracelet.Buckle:Pinkgoldfoldingbuckle.

162CHRISTIAANVANDERKLAAUWTERMINOLOGYTERMINOLOGYALBEDOPlanetsemitnolight.Their‘albedo’istheratiobetweenthelighttheyreflectandthatincidentfromtheSun.ANCHOR(PALLETFORK)Partoftheescapementthatregulatesacontrolledunwindingofthepowerfromthemainspringtruethegeartrain.ANTI-SHOCKSYSTEMSpring-loadedbearingthatprotectsthepivotsofthebalancewheelaxisagainstalightshock.Thisreducesthechanceofthepivotsbreaking.APHELIONThatpointofaplanet’s,comet’sorplanetoid’sellipticalorbitatwhichitisfarthestfromtheSun.APOGEEThepointfarthestfromtheEarthreachedbytheMooninitsorbit.ASTEROIDSRockybodiesbetween1kmand700kmindiameter,thepathsofwhicharoundtheSunliemostlybetweenMarsandJupiter.ATMOSPHEREThemassofgasenvelopingacelestialbody,whichisheldinplacebygravity.AURORAAnatmosphericlightphenomenoncausedbytheenergyradiationfromtheSunthatexcitesgasesinthehighestpartsoftheatmosphere.AUTOMATICWATCHAself-windingwatchthatiskeptfullywound,duringwearingofthewatch,byanoscillatingweight(mass)thatmovesonanaxisandispulleddownbygravity.Thismotionistransferredtrueasequenceofwheeltowindthemainspring.AZIMUTHAco-ordinateemployedtodefinethepositionofcelestialbodies.BALANCESPRINGAlsocalledhairspring,isaflatandthinspirallywoundspringattachedbetweenaxisofthebalancewheelandstudfixedonthebalancebridge.Thetimingofthemovementisdonebylengthening(slower)orshortening(faster)thehairspringusingthecompass.

CHRISTIAANVANDERKLAAUWTERMINOLOGY163BALANCEWHEELPartoftheescapementthatregulatesthetimekeeping.CHRONOGRAPHAninstrumentforaccuratelymeasuringandrecordingtimeintervals.COMPLICATIONAfunctionalityotherthanthatforthetimeindication.CAL.(ORCALIBRE)Othertermformovement.CARAT1carat=1/24thpartofpuregoldinanalloy.An18-caratgoldalloycontains18/24thsofpuregold=75%puregold.CHROMOSPHEREThatpartoftheSun’satmospherethatliesbetweenthephotosphere(thelight-givingpart)andthecorona.CHRONOMETERAcertifiedmovementthatmeetsthetimekeepingstandardssetbytheContrôleSuissedeChronometrès(COSC).COMETAlumpofmaterialthatrevolvesaroundtheSuninanelliptical,parabolicorhyperbolicorbit.ThetailofthecometisalwaysturnedawayfromtheSun.COMPASSTwopinwherethebalancespringmovebetween.Thisisuseforthetimingofthemovement.AlsoseeBalancespringorfineadjustment.CONSTELLATIONSAconfigurationofstars,mainlyusedtoidentifygivenareasintheheavens.Thereare88constellations.CROWN(ORWINDINGCROWN)Thecrownisapartontheoutsideofthewatchcasethatisusedtoadjustthewatchtotherightsettings.Inamechanicalwatchisalsousedforwindingthemainspring.DECLINATIONAco-ordinateemployedtofixthepositionsofcelestialbodies.

164CHRISTIAANVANDERKLAAUWTERMINOLOGYECLIPSEThetotalorpartialobscuringofonecelestialbodybyanother.ThistermisusedinthesystemofEarth,SunandMoon.Forothercelestialbodiesweusethetermcovering.ESCAPEMENTThebalancewheel,anchorandescapewheeltogetherarecalledtheEscapementandregulatestherunningandtimekeepingofamovementGPHGGrandPrixd’HorlogeriedeGenève(GPHG).KnownasthemostprestigiousWatchAwardintheworld,the‘Oscars’ofwatchmaking.ECLIPTICTheyearlyapparentpathoftheSunalongthecelestialsphere.FINEADJUSTMENTMechanismemployedtopreciselyadjusttherunningofawatch.GUILLOCHEDecoratemetalcomponentsbyhandwithpatternsoffine,intertwinedlines.ECCENTRICITYOROFF-CENTRINGAmathematicaltermusedtodefinetheformofanorbit.Acircularorbithasaneccentricityofzero.TheEarth’sorbitisalmostcircular:itseccentricityis0.017.ECLIPSEOFTHEMOONThistakesplacewhenthereisafullMoonandtheMoonisintheumbriaoftheEarth.GEARTRAINAsequenceofwheelsthattransferthepowerfromthemainspringtotheescapement.GMTTheabbreviationforGreenwichMeanTime.Itisoneofthetimestandards.HELIOCENTRISMIstheastronomicalmodelinwhichtheEarthandplanetsrevolvearoundtheSunatthecenteroftheSolarSystem.Heliocentrismwasopposedtogeocentrism,whichplacedtheEarthatthecenter.

CHRISTIAANVANDERKLAAUWTERMINOLOGY165HAUTEHORLOGERIETheFondationHauteHorlogerie(FHH)isbasedinSwitzerland.Itdefinesandqualifiesluxurybrandsas‘HauteHorlogerie’(high-endhorology).HYPERNOVAAHypernovaisatypeofstarexplosionwithanenergysubstantiallyhigherthanthatofstandardSupernova.INNERPLANETAplanetclosertotheSunthantheEarth(VenusandMercury).JEWELSSyntheticrubiesusedasbearingsforthepivotsofthegearwheelsinamovementinordertoreducefrictionandwear.KEPLER’SLAWSKepler’slawsofplanetarymotionare:1.TheplanetsdescribeellipseswiththeSunatafocus.2.ThelinefromtheSuntoanyplanetdescribesequalareasinequaltimes.3.ThesquaresoftheperiodictimesoftheplanetsareproportionaltothecubesoftheirmeandistancesfromtheSun.KLAAUWENZONLogoofChristiaanvanderKlaauwAstronomicalWatches.Consistsof12claws(IntheDutchlanguageKlaauwmeansclaw),wherethe12clawsrepresentthehours.TogethertheyformtheSun,humanity’smostimportantstar.LIBRATIONAnupanddownandbackwardsandforwardsmovementthatisconnectedtotherevolutionoftheMoonaroundtheEarth.LIGHT-YEARThedistancecoveredbylightinoneyear.Aunittomeasurethedistancestothestars.Onelightyearis9460thousandmillionkilometres(about5878thousandmillionmiles).LMSTLocalMeanSolarTime.LUNETTETherimofthewatchholdingtheglass.

166CHRISTIAANVANDERKLAAUWTERMINOLOGYMAGNITUDE(OFASTAR)Theapparentmagnitudeofastarisameasureofitsbrightness,asseenfromtheEarth.Brightstarsaresaidtobeofthefirstmagnitude.Theweakeststarsthatcanbeseenwiththenakedeyeareofthesixthmagnitude.MICRONUnitofmeasurement:1micron=1/1000mm.MOONThenaturalsatelliteoftheEarth.TheMoonisrelativelysuchalargesatellitethattheEarthandMoonseemtoformadoubleplanet.ItorbitstheEarthin29,5305889days.MOONPHASEMechanicalrepresentationofthephasesoftheMoon.NADIRThepointofthecelestialspherethatisdirectlyoppositetheZenithandverticallydownwardfromtheobserver.NODETheeclipticplaneistheplanethroughtheSunandtheEarthmovingaroundit.TheorbitalplanesofothercelestialbodiesthatalsoorbittheSunarenotintheeclipticplanebutareatanangletothisplane.Theintersectionsoftheplaneswiththeeclipticplanearecallednodes.NOVAThesearestarsthatsuddenlybecomemuchbrighter.Theirbrightnessreturnstonormalafterseveraldaysorafterseveralyears.Astronomersbelievethatnovaareoldstarsthatexpandwhentheyemitlargequantitiesofenergy.NUTATIONAslightnoddingoftheEarth’saxissuperimposedonitsnormalprecession.OCCULTATIONTheeclipsingofonecelestialbodybyanother,usuallymuchlargerone.ORBITThepathfollowedbyacelestialbody.

CHRISTIAANVANDERKLAAUWTERMINOLOGY167OUTERPLANETSTheplanetswhoseorbitslieoutsidethatoftheEarth.PARALLAXAnangleusedtomeasurethedistancesofstars.ItisthehalfanglebetweentheEarthononesideofitsorbit,thestar,andtheEarthontheothersideofitsorbit.PARSECAunitofdistanceusedinastronomyandbasedonparallax.Iftheparallaxangleisonesecond(1/3600ofadegree),thedistanceissaidtobe1parsec(1parsec=3.26light-years).PERIGEEThepointnearesttotheEarthintheorbitoftheMoon.PERPETUALCALENDERInwatchmaking,‘perpetualcalendar’describesacalendarmechanismthatcorrectlydisplaysthedateonthewatch‘perpetually’,takingintoaccountthedifferentlengthsofthemonthsaswellasleapdays.PLANISPHEREItisastarchartthatturnsaroundevery23hours,56minutesand4,091seconds,givingyouthecorrectviewofthestarsandconstellations.PERIHELIONThatpointintheorbitofaplanetorcometthatisnearesttotheSun.PHOTOSPHERETheluminoussurfacelayeroftheSun.POLARISOrPolestar,whichisnearenoughtotheEarth’snorthcelestialpoletomarkitforroughobservations.POWERRESERVEThetimeawatchneedstorunwhenfullywoundandnotbeingworn.PRECESSIONBecausetheEarthisnotcompletelyspherical,itsaxisalsorotates.Thisistermedprecession.RETROGRADEHANDAhandthat,aftergoingthroughonecycle,jumpsbacktothebeginningofthecycletostartagain.

168CHRISTIAANVANDERKLAAUWTERMINOLOGYROTATIONTherotatingwhirlingmotionofacelestialbodyaboutitsownaxis.ROTORAlsocalledoscillatingweight.Amovingmassthatkeepsthemovementfullywound.AlsoseeAutomaticwatchSAPPHIREGLASSAwatchglassmadefromsyntheticsapphire.Thisisharderandmorescratchresistantthanmineralglass.SATELLITEAcelestialbodythatorbitsaplanet.SIDEREALPERIODThisistheperiodofrevolutionofonecelestialbodyaboutanother,withreferencetothestars.SIDEREALDAYAsiderealdayisapproximately23hours,56minutes,4.0916seconds,correspondingtothetimeittakesfortheEarthtocompleteonerotationrelativetothevernalequinox.SOLARSYSTEMTheSuntogetherwiththeplanetsandothercelestialbodies.SPRINGAcoilorstripofmetalthatcanbetensionedsoastostoretheenergyneededtorunawatchorclockmovement.STARAlarge,hot,gaseousbodysuchastheSun,whichemitslight.SUNThestarnearesttotheEarthandthesourceofnearlyalloftheEarth’senergy.SUNSPOTAtransientdarkmarkingonthevisiblesurfaceoftheSun,whichistwothousanddegreescoolerthantherestoftheSun.

CHRISTIAANVANDERKLAAUWTERMINOLOGY169SUPERNOVAAsupernovaisastellarexplosionthatbrieflyoutshinesanentiregalaxy,radiatingasmuchenergyastheSunoranyordinarystarisexpectedtoemitoveritsentirelifespan,beforefadingfromviewoverseveralweeksormonths.SYNODICPERIODThetimetakenforacelestialbodyfromthesolarsystemtomakeanorbitoftheSun,asseenfromEarth.TIMEADJUSTMENTUsingamechanismtopreciselyadjustthetimingofthemovementbylengthening(slower)orshortening(faster)thehairspringusingthecompass.AlsoseeBalancespringandCompass.TITANTitanisthelargestmoonofSaturnandwasdiscoveredin1655bytheDutchastronomerMr.ChristiaanHuygens.ZENITHThepointonthecelestialsphereverticallyabovetheobserver’shead.ZODIACThebeltofstarsthroughwhichtheeclipticpassescentrally.TherearetwelveimportantsignsoftheZodiac.TIDESTidesaretheriseandfallofsealevelscausedbythecombinedeffectsofgravitationalforcesexertedbytheMoon,Sun,androtationoftheEarth.TOURBILLONWATCHAwatchfittedwithadeviceforcounteringtheeffectsofgravityonitsmovement.

CVDKREALMOONJOUREGREENMETEORITE

172CHRISTIAANVANDERKLAAUWREFERENCEREGISTERREFERENCEREGISTERP.68CVDKPLANETARIUMCKPT3304P.88CVDKREALMOONTIDESCKRS3324P.118CVDKARIADNECKAR3335P.68CVDKPLANETARIUMCKPT3344P.88CVDKREALMOONTIDESCKRS3304P.118CVDKARIADNECKAR3366P.68CVDKPLANETARIUMCKPT1124P.88CVDKREALMOONTIDESCKRS1124P.119CVDKARIADNECKAR3344P.69CVDKPLANETARIUMCKPT7724P.89CVDKREALMOONTIDESCKRS7804P.69CVDKPLANETARIUMCKPT2225P.89CVDKREALMOONTIDESCKRS7725P.122CVDKLADYORIONSTARDUSTCKOD3304P.72CVDKPLANETARIUMCKPM3305DunesofMarsP.122CVDKLADYORIONSTARDUSTCKOD3804P.72CVDKPLANETARIUMCKPM1105DunesofMarsP.96CVDKREALMOON1980CKRL3344P.122CVDKLADYORIONSTARDUSTCKOD1104P.72CVDKPLANETARIUMCKPM7705DunesofMarsP.96CVDKREALMOON1980CKRL3304P.123CVDKLADYORIONSTARDUSTCKOD1804P.96CVDKREALMOON1980CKRL1124P.123CVDKLADYORIONSTARDUSTCKOD7704P.143CVDKPLANETARIUMEiseEisingaLimitedEditionP.97CVDKREALMOON1980CKRL7725P.123CVDKLADYORIONSTARDUSTCKOD7804P.78CVDKREALMOONJOURECKRJ3324P.102CVDKTITANPERPETUALCKTT3324P.78CVDKREALMOONJOURECKRJ3344P.78CVDKREALMOONJOURECKRJ3304P.108CVDKORIONCKOR3326P.79CVDKREALMOONJOURECKRJ3894P.108CVDKORIONCKOR1126P.79CVDKREALMOONJOURECKRJ1124P.79CVDKREALMOONJOURECKRJ7724P.112CVDKHYPERNOVACKHN3326P.82CVDKREALMOONJOURECKRJ33G4GreenMeteoriteP.112CVDKHYPERNOVACKHN3366P.82CVDKREALMOONJOURECKRJ11G4GreenMeteoriteP.112CVDKHYPERNOVACKHN3344P.82CVDKREALMOONJOURECKRJ77G4GreenMeteoriteP.113CVDKHYPERNOVACKHN3335

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