HATTORY-SEIKO Y504BrandHATTORY-SEIKOCaliberY504SizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Y504Winding stem03546019840354601