HATTORY-SEIKO 8621A Exploded diagram BrandHATTORY-SEIKOCaliber8621ASizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryMovementsArtno.brandcaliberSizehandsfunctionspecialHATTORY-SEIKO8621A WatchpartsPart NocaliberdescriptionoriginalArtno.4060Coil -red4002-460025998