HATTORY-SEIKO WWW4BrandHATTORY-SEIKOCaliberWWW4SizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401WWW4Winding stem03511559840351155