IWC 430BrandIWCCaliber430SizeFunctionVersionHandsStem5317Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8025317471Friction spring f. sweep sec.-pinion