HATTORY-SEIKO 8522A Exploded diagram BrandHATTORY-SEIKOCaliber8522ASizeFunctionVersionHandsStem354-455Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryMovementsArtno.brandcaliberSizehandsfunctionspecialHATTORY-SEIKO8522A WatchpartsPart NocaliberdescriptionoriginalArtno.401BHandsetting stem354-4559840354455