HATTORY-SEIKO 6431A Exploded diagram BrandHATTORY-SEIKOCaliber6431ASizeFunctionVersionHandsStem354-640 (NL)Stem (subs.)354-641Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.4016423AHandsetting stem354-64098403546404016431Winding stem035464198403546414060Coil -red4002-642025998.6431MAIN PLATE(PLASTIC)01016489840101648.6431CENTER WHEEL BRIDGE01226429840122642.6431TRAIN WHEEL BRIDGE01256309840125630.6431CENTER WHEEL AND PINION02216519840221651.6431FOURTH WHEEL AND PINION02416519840241651.6431Hour wheel02716449840271644.6431Setting lever03836419840383641