HATTORY-SEIKO 6870BrandHATTORY-SEIKOCaliber6870SizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.4016870Winding stem035137598403513754016870Winding stem03513709840351370