Caliber 9SA5 | MECHANICAL | Movement | About | Grand Seiko

Remarkably, given its enhanced functionality, Caliber 9SA5 is slimmer than any existing Grand Seiko high beat movement. It is in fact 0.8mm or 15% thinner ... MENUCollectionsMasterpieceCollectionNEWLIMITEDSBGD209LIMITEDSBGZ007LIMITEDSBGD207LIMITEDSBGZ005SBGZ003SBGD202SBGD201Evolution9CollectionEvolution9.AnewdesignforaneweraTheEvolution9diver’swatchTheEvolution9ChronographTheEvolution9GMTHeritageCollection44GS62GSThenaturalflowoftimeGrandSeikoandtheessentialsofwatchmakingSportCollectionTheGrandSeikodiver’swatch.AtrueoriginalPerhapsthemostprecisespring-drivenchronographintheworldSports.Evenings.Anytime.Anywhere.Time, nature and beautyCombiningceramicandtitaniumAsportsdesignforalloflifeEleganceCollectionUnderstatementasartistryThefirstGrandSeikowatch,faithfullyre-createdwithaneyetothefutureThefusionoftheclassicalandthecontemporaryAwomen’swatchwithalltheeleganceofGrandSeikoAstrikingyetrefinedGrandSeikotimepieceforwomenStrapandClaspWatchfinderNewsPressReleaseInformationFeaturesWatchesinspiredbynatureHistoryandWatchmakingWorldofGrandSeikoAboutManufactureTheGrandSeikoStudioShizukuishiTheShinshuWatchStudioMovement9SMechanical9FQuartz9RSpringDriveSupportGrandSeikoCompleteServiceInstructionsServiceNetworkFAQsWarrantyDetailsSearchStoresSELECTREGIONGLOBALAUSTRALIABELGIUMBRAZILCANADA(ENGLISH)CANADA(FRENCH)FRANCEGERMANYINDIAITALYJAPANINDONESIAKOREANETHERLANDSNEWZEALANDPANAMAPHILIPPINESP.R.CHINARUSSIASPAINTAIWANREGIONTHAILANDTHEUNITEDSTATESTURKEYUNITEDKINGDOMHOMEAboutMovementMECHANICALCaliber9SA59SMECHANICALMOVEMENTHi-Beat3600080HoursCaliber9SA5Hi-Beat3600080HoursCaliber9SA5AfterthewideacclaimgivenovermanyyearstotheCaliber9Sseriesofmechanicalmovements,ithadlongbeenGrandSeiko’sgoaltopushtheboundariesbackfurtherandcreateanewmechanicalmovementwithenhancedperformance,justasthefirst9Smovementhaddonetwodecadesbefore.Thedecisionwastakentoaimforanew10-beatmovementthatwouldofferagreatlyincreasedpowerreserve.ThisishowCaliber9SA5wasborn.SPECIFICATIONSWindingmechanismAutomaticwithmanualwindingMeandailyrate*+5to-3secondsperdayNormalusageaccuracy+8to-1secondsperdayVibrations36,000vibrationsperhour(10beatspersecond)PowerreserveApproximately80hoursNumberofJewels47jewelsFeatures-DualImpulseEscapement-Twinbarrels-Instantdatechangemechanism*Meandailyrateisameanvalueofdailyratesinaconditionwherethemovementbeforeassemblyinacaseismeasuredinsixpositionsinafixedmannerunderartificiallycontrolledenvironmentfor12days.ThebestGrandSeikomechanicalmovementevercreatedItsbirthplacewastheGrandSeikoStudioShizukuishi,where, formanydecades,craftsmenandwomenhavebeenresponsibleforthedesignandmanufactureofallGrandSeikomechanicalwatches.Itwashere,too,thatthefirst9Smovementhadbeencreated.Thedesigners,engineersandwatchmakersofthestudiohavetwoimportantassetsattheirdisposal.First,theyhaveinheritedthetraditionandaccumulatedknow-howthathasbeenbuiltoverdecadesasGrandSeikohaspursueditsaimof“unflaggingpracticalinnovation”attheveryhighestlevelofthehorologicalindustry.Second,asafullyintegrated“manufacture,”GrandSeikohasmasteryofeveryaspectofthewatchmaker’sartandhascompletein-housecontrolovereverytechnicalaspectofeverysinglemovementcomponent.Caliber9SA5isthedirectresultofthesynergyofthesetwoimportantassets,asitsadvancedfunctionalityanditsexquisitecraftsmanshipbearpowerfultestament.TheDualImpulseEscapementincreasesthetransferefficiencyofthepowerofthemainspring.TheDualImpulseEscapementisauniquemechanismwhichcombines“directimpulse,”wherepoweristransferreddirectlyfromtheescapewheeltothebalance,withconventional“indirectimpulse.”Thereby,ittransferspowertothebalancethroughthemainspringwithincreasedefficiency.Conventionalwisdomdecreesthatthemoreyouincreasethevibrationrateofthebalance,thelowerthepowertransferefficiency.Thisisbecausetheescapewheelandpalletforkcannotkeepupwiththehighoscillationspeed.ThischallengeismetinCaliber9SA5asithasnewcomponentsmadewithMEMStechnologytoincreasetheescapementefficiency.Connectingthesetothetwinbarrelsallowsfor10beatspersecondwhiledeliveringacontinuousoperationperiodof80hours.ThenewGrandSeikoovercoildeliversprecisionandincreasedstability.Caliber9SA5incorporatesseveralnewinventions,oneofwhichisanovercoil.Createdespeciallyforthismovement,thisnewovercoilhasauniquecurvedshapethatwasdecidedaftermorethan80,000simulations,asaresultofwhichitsperformanceisoptimizedineverypossibleposition.ThesecretliesintheprecisionmanufactureofthecomponentsandintheextraordinaryadjustmentskillsofthewatchmakersattheGrandSeikoStudioShizukuishi.TheGrandSeikoFree-sprungBalanceregulatestheisochronismforlong-termprecisionandstability.Forthefinetuningoftheescapement’sprecision,anewfree-sprungsystemwhichdoesnothavearegulatorhasbeenincorporated.Thefourscrewsonthesideofthebalancecanbeturnedtoadjustthemomentofinertiaofthebalance,allowingforfinetuningtomakethewatchfasterorslower.Asthereisnoregulator,thedurabilityofthehairspringisincreased,asistheprecisionovertime.TheGrandSeikoFree-sprungBalanceisequippedwithamechanismthataltersisochronismunderfixedconditionswhenthestudattheendofthehairspringrotates.Thus,itispossibletoadjusttheisochronismwhilestillremainingafree-sprungsystemwithnoregulator.AbalancewithalargemomentofinertiaandtwinbarrelsthatenhancethepowerreserveApowerreserveof80hoursisexceptionalforahighbeatmovement.Caliber9SA5achievesthiswithacombinationoftwotechnologies.First,theDualImpulseEscapementhashighenergyefficiencyand,second,thetwinbarrelsdelivermorepower.Inaddition,thedurabilityofthemovementisensuredbyamechanismwhichdecreasestheloadplacedonthefrontgeartrain.Sincethetwinbarrelsdelivermorepower,a10-beatmovementwithabalanceoflargemomentofinertiaismadepossible.Afasterdatechange,madepossiblebyanew“datefinger”Toreflectthehighprecisionofthemovement,anewdatechangemechanismwascreatedforCaliber9SA5whichensuresthatthedatechangesmuchmorequickly.ItusesanewmovabledatefingerwhosecomplexshapeandsmallsizeweremadepossiblebyMEMStechnology,whichalsoincreasestheprecisionofitsoperationanditsdurability.Aslimmovementmakespossibleawatchthatfitscomfortably.Remarkably,givenitsenhancedfunctionality,Caliber9SA5isslimmerthananyexistingGrandSeikohighbeatmovement.Itisinfact0.8mmor15%thinnerwhichallowsthewatchcasesthathouseittobeslimmerandtositmorefirmlyonthewrist.Thisadvantageisfurtherenhancedbythenewpositionofthecrownwhichislowerandclosertothecaseback.Thislowersthecenterofgravityofthewatchandaddstotheoverallslimnessofthewatchwhenonthewrist.Aworkofart,asbeautifulasitisadvanced.Themovementisasbeautifultobeholdasitisefficientinoperation.Fromtheverybeginning,thedesignersweredeterminedthatthemovementtheywerecreatingwouldhaveanaestheticappealthatmatchedthehighlevelofitsperformanceanditsultimateappearancewasalwaysfrontofmindateverystageofitsdevelopment.Atfirstglance,itisthemanycurvesandroundedsurfacesthatcatchtheeyeandgivethemovementawarmandalmostorganicfeel.Thisreflectsthedesigners’senseoftheirplaceinnature.ThebridgehasagentlycurvingoutlinethatisinspiredbytheshapeofMt.IwateandabendinthenearbyShizukuishiRiverthatrunspastthestudiowherethewatchismade.Thesecondimpressionthemovementcreatesisoneoftexture.Fromeveryangle,differenttexturesaretobeseeninharmony.Thesideofthemovementhasamattefinishandasubduedtonethatabsorbsthelightwhereastheridges,edgesandscrewholesaresharplycutandpolishedtoabrilliantfinishthatsparkleswithprecision.Whatmakes9SMechanicalspecial?TheconceptofGrandSeikowasbornfromthedesiretobuildtheworld'sbestwatch,andthecollectioncontinuestopushprecisioninmechanicalwatchestothelimitsoftimekeepingtechnology.Asatruemanufacture,GrandSeikoincorporatesthelatesttechnologyalongsideitsbreadthofcraftsmanshiptoraisetheartofwatchmakingtoitspeak.MORECALIBER9SA5MODELSNEWSLGH011NEWLIMITEDSLGH009LIMITEDSLGH007SLGH005MORE9SMECHANICALMOVEMENTHi-Beat3600080HoursCaliber9SA5MECHANICALHI-BEAT36000GMTCaliber9S86MECHANICALHI-BEAT36000Caliber9S85AUTOMATIC3-DAYPOWERRESERVECaliber9S68AUTOMATIC3-DAYPOWERRESERVEGMTCaliber9S66AUTOMATIC3-DAYPOWERRESERVECaliber9S65MANUAL-WINDINGCaliber9S64MANUAL-WINDINGWITHASMALLSECONDSHANDCaliber9S63SMALLSIZEAUTOMATICCaliber9S27BACKTO9SMechanical9SMechanical9FQuartz9RSpringDriveManufactureDesignHistoryGrandSeikophilosophyTHENATUREOFTIMETHENATUREOFTIMETheGrandSeikoCo-Creators Caliber9SA5|MECHANICAL|Movement|About|GrandSeiko