HATTORY-SEIKO 7918A Exploded diagram BrandHATTORY-SEIKOCaliber7918ASizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.4017918Winding stem03547919840354791.7918MAIN PLATE(PLASTIC)01017999840101799.7918CENTER WHEEL BRIDGE01227919840122791.7918CENTER WHEEL AND PINION02217919840221791.7918Cannon pinion02257929840225792.7918FOURTH WHEEL AND PINION02417929840241792.7918Hour wheel02717929840271792.7918Setting lever03837919840383791