IWC 89BrandIWCCaliber89SizeFunctionVersionHandsStem7455Stem (subs.)Stem (2 pce)Balance staff31026Balance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.205BCenter wheel drilled + cannon94200205C89275Sweep second pinionB94200275C89401Winding stem8027455410BWinding pignon94200410C89425BClicking spring94200425C89430BClick spring94200430C89445Setting lever jumper combinded9420044589471BFriction spring f. sweep sec.-pinion9420047189723Balance staff ST -shock-absorber80231026