HATTORY-SEIKO 8Y21ABrandHATTORY-SEIKOCaliber8Y21ASize6 3/4x8FunctionSCVersionHands0.65x1.10x0.20StemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)Battery364MovementsArtno.brandcaliberSizehandsfunctionspecialHATTORY-SEIKO8Y21A6 3/4x80.65x1.10x0.20SC WatchpartsPart NocaliberdescriptionoriginalArtno.4018Y21Winding stem03511129840351112.8Y21MAIN PLATE(PLASTIC)01000469840100046.8Y21TRAIN WHEEL BRIDGE01251349840125134.8Y21FOURTH WHEEL AND PINION02414619840241461.8Y21CENTER MINUTE WHEEL02704869840270486.8Y21Hour wheel02714869840271486