HATTORY-SEIKO 7730BrandHATTORY-SEIKOCaliber7730SizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.4017730Winding stem035437398403543734017730Winding stem03543719840354371.7730MAIN PLATE(PLASTIC)01014499840101449.7730TRAIN WHEEL BRIDGE01253849840125384.7730FOURTH WHEEL AND PINION02413759840241375.7730CENTER MINUTE WHEEL02700819840270081.7730CENTER MINUTE WHEEL02703809840270380.7730Hour wheel02713759840271375.7730Setting lever03833719840383371