HATTORY-SEIKO 5Y81BrandHATTORY-SEIKOCaliber5Y81SizeFunctionVersionHandsStem354-530Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.4015Y81Winding stem03545309840354530.5Y81MAIN PLATE(PLASTIC)01005369840100536.5Y81TRAIN WHEEL BRIDGE01255309840125530.5Y81CENTER WHEEL AND PINION02215319840221531.5Y81FOURTH WHEEL AND PINION02415319840241531.5Y81Hour wheel02715319840271531.5Y81Setting lever03835309840383530