IWC 421BrandIWCCaliber421SizeFunctionVersionHandsStem6338Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.180/1C403Barrel complete -with mainspring94200180403401Winding stem8026338