IWC 4111 Brand IWC Caliber 4111 Size Function Version Hands Stem 5441 Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8025441445= C412Setting lever spring94200445C412