IWC 87BrandIWCCaliber87SizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staff31026Balance staff (subs.)Mainspring (subs.)1,10x9,50x0,105Mainspring (subs.)SpezialBatteryWatchpartsPart NocaliberdescriptionoriginalArtno.723Balance staff ST -shock-absorber80231026770BMainspring t-hook9420077087