HATTORY-SEIKO 9921BrandHATTORY-SEIKOCaliber9921SizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.4019921Winding stem03547819840354781.9921MAIN PLATE(PLASTIC)01017339840101733.9921CENTER WHEEL BRIDGE01227319840122731.9921CENTER WHEEL AND PINION02217819840221781.9921Cannon pinion02257819840225781.9921FOURTH WHEEL AND PINION02417819840241781.9921Hour wheel02717819840271781.9921Setting lever03837809840383780