HATTORY-SEIKO 8620A Exploded diagram BrandHATTORY-SEIKOCaliber8620ASizeFunctionVersionHandsStem351-460Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryMovementsArtno.brandcaliberSizehandsfunctionspecialHATTORY-SEIKO8620A WatchpartsPart NocaliberdescriptionoriginalArtno.2108620Third wheel231-4609840231460405Winding stem -mouv.part351-4609840351460.8620Battery connection427146098404271460