IWC 73BrandIWCCaliber73SizeFunctionVersionHandsStemDCN 142Stem (subs.)Stem (2 pce)Balance staff36012Balance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Handsetting stemDCN 14294204019723BBalance staff ST -shock-absorber80236012