OMEGA 220BrandOMEGACaliber220SizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.705B = 320-1305Escape wheel -pinion straigt piv.220-130596502201305705320Escape wheel -pinion straigt piv.320-130596503201305