HATTORY-SEIKO 9550A Exploded diagram Brand HATTORY-SEIKO Caliber 9550A Size Function Version Hands Stem 354-855 Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery Watchparts Part 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