OMEGA 1080 Brand OMEGA Caliber 1080 Size Function Version Hands Stem 4505 Stem (subs.) Stem (2 pce) Balance staff 25806 Balance staff (subs.) Mainspring (subs.) eigen Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8024505723Balance staff ST -shock-absorber80225806