IWC 8541BrandIWCCaliber8541Size13FunctionVersionHands0,80x1,40Stem6406Stem (subs.)Stem (2 pce)Balance staff29808Balance staff (subs.)Mainspring (subs.)1.10x10.5x0.12 AUTMainspring (subs.)820 2653 1BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.205= 854Center wheel drilled + cannon94200205C854401Winding stem8026406434= 854Clicking spring8542494200434854443= 854Setting lever assembled94200443854721BBalnace cplt. -for shock-absorber942007218541723Balance staff ST -shock-absorber80229808771= 854Mainspring AUT sliding attachemnet820265311489= 854Pawel winding wheel85400594201489854