HATTORY-SEIKO 7731BrandHATTORY-SEIKOCaliber7731SizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.4017731Winding stem03543719840354371.7731MAIN PLATE(PLASTIC)01014499840101449.7731TRAIN WHEEL BRIDGE01253869840125386.7731FOURTH WHEEL AND PINION02410759840241075.7731FOURTH WHEEL AND PINION02413739840241373.7731CENTER MINUTE WHEEL02700759840270075.7731CENTER MINUTE WHEEL02703739840270373.7731Hour wheel02713739840271373.7731Hour wheel02713759840271375.7731Setting lever03833719840383371.7731BACK PLATE89968111