HATTORY-SEIKO 5931A Exploded diagram BrandHATTORY-SEIKOCaliber5931ASizeFunctionVersionHandsStem354-495Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryMovementsArtno.brandcaliberSizehandsfunctionspecialHATTORY-SEIKO5931A WatchpartsPart NocaliberdescriptionoriginalArtno.4015931Winding stem035449498403544944015931Winding stem0354236984035423640605930Coil -red4002-49098404002490