OMEGA 687BrandOMEGACaliber687SizeFunctionVersionHands0,50x1,10Stem5020Stem (subs.)5047Stem (2 pce)Balance staff21801Balance staff (subs.)Mainspring (subs.)eigenMainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8025020401Aufzugwelle Ersatz8025047723Balance staff ST -shock-absorber80221801