HATTORY-SEIKO 1231A Exploded diagram Brand HATTORY-SEIKO Caliber 1231A Size Function Version Hands Stem 351-117 Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery Watchparts Part 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