IWC 41BrandIWCCaliber41SizeFunctionVersionHandsStem5441Stem (subs.)Stem (2 pce)Balance staff28120Balance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8025441445= C412Setting lever spring94200445C412721BBalnace cplt. -for shock-absorber9420072141723Balance staff ST -shock-absorber