HATTORY-SEIKO 1231A Exploded diagram BrandHATTORY-SEIKOCaliber1231ASizeFunctionVersionHandsStem351-117Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.4011231Winding stem03511179840351117.1231MAIN PLATE(PLASTIC)01013679840101367.1231TRAIN WHEEL BRIDGE01251259840125125.1231FOURTH WHEEL AND PINION02411219840241121.1231FOURTH WHEEL AND PINION02411229840241122.1231CENTER MINUTE WHEEL02701209840270120.1231CENTER MINUTE WHEEL02701239840270123.1231Hour wheel02711219840271121.1231Hour wheel02711239840271123.1231Setting lever03831219840383121