HATTORY-SEIKO 5Y91 Exploded diagram Brand HATTORY-SEIKO Caliber 5Y91 Size 6 3/4x8 Function o. SC Version Hands 0.65x1.10 Stem 351-486 Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery 364 MovementsArtno.brandcaliberSizehandsfunctionspecial162650HATTORY-PULSARY482 A6 3/4x80.65x1.10o. SC Watchparts Part NocaliberdescriptionoriginalArtno.4015Y91Winding stem03547869840354786.5Y91MAIN PLATE(PLASTIC)01017859840101785.5Y91TRAIN WHEEL BRIDGE01257869840125786.5Y91CENTER WHEEL AND PINION02217859840221785.5Y91FOURTH WHEEL AND PINION02417939840241793.5Y91Hour wheel02717859840271785.5Y91Setting lever03837859840383785