OMEGA 830 Exploded diagram Brand OMEGA Caliber 830 Size Function Version Hands Stem 9034 Stem (subs.) Stem (2 pce) Balance staff 36805 Balance staff (subs.) Mainspring (subs.) 1.50x14.50x0.18x460 Mainspring (subs.) Battery Watchparts Part NocaliberdescriptionoriginalArtno.401Winding stem8029034723Balance staff ST -shock-absorber80236805771BMainspring AUT sliding attachemnet830-120896508301208