OMEGA 663 Exploded diagram BrandOMEGACaliber663SizeFunctionVersionHandsStem5059Stem (subs.)5060Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)662-1208Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.180= 662Barrel with drum + cover195= 662Barell arbor200= 662Center wheel + cannon pinion220= 662Second wheel -short pivot240= 662Cannon pinion301= 662Regulator for flat hairspring364= 662Stud support - flat hairspring401= 662Winding stem - short8025059401= 662Winding stem - long thread8025060407= 662Clutch wheel410= 662Winding pignon425= 662Clicking spring430= 662Click spring443= 662Setting lever assembled96506621109445= 662Setting lever spring96506621110705= 662Escape wheel -pinion straigt piv.96506621305771Mainspring AUT sliding attachemnet662-1208965066212081496=662Oscillating weight axle662-140096506621400