IWC 83BrandIWCCaliber83Size12FunctionVersionHandsStem7456Stem (subs.)Stem (2 pce)Balance staffeigenBalance staff (subs.)Mainspring (subs.)1,25x10,5x0,100Mainspring (subs.)SpezialBatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8027456443BSetting lever assembled9420044383445BSetting lever jumper combinded9420044583723BBalance staff ST -shock-absorber9420072383723BBalance staff ST -shock-absorberINCA94200724C83770BMainspring t-hook9420077083