IWC 412BrandIWCCaliber412SizeFunctionVersionHandsStem5441Stem (subs.)Stem (2 pce)Balance staff14302 (Boley Nr.)Balance staff (subs.)Mainspring (subs.)SpezialMainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8025441445BSetting lever spring94200445C412723Balance staff ST -shock-absorber80214302770BMainspring94200770412