OMEGA 251 Brand OMEGA Caliber 251 Size Function SC Version Hands 0,65x1,10 Stem 6323 Stem (subs.) Stem (2 pce) Balance staff 26301 Balance staff (subs.) 25902 INCA Mainspring (subs.) Spez. Mainspring (subs.) Battery Watchparts Part NocaliberdescriptionoriginalArtno.195= 240Barell arbor240-120496502401204401Winding stem8026323443= 240Setting lever assembled240-110996502401109445= 240Setting lever spring240-111096502401110723Balance staff ST -shock-absorber80226301723Balance staff, pivoted80225902