HATTORY-SEIKO 9550A Exploded diagram BrandHATTORY-SEIKOCaliber9550ASizeFunctionVersionHandsStem354-855Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.4019550Winding stem03548559840354855.9550MAIN PLATE(PLASTIC)01018559840101855.9550CENTER WHEEL BRIDGE01228559840122855.9550TRAIN WHEEL BRIDGE01258579840125857.9550CENTER WHEEL AND PINION02218519840221851.9550FOURTH WHEEL AND PINION02418519840241851.9550Hour wheel02718559840271855.9550Setting lever03838559840383855