HATTORY-SEIKO 8305ABrandHATTORY-SEIKOCaliber8305ASizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.02378721Balnace cplt. -for shock-absorber310-83098403108307714006Mainspring AUT sliding attachemnet401-805 =2378X9840401805