OMEGA 1861 Exploded diagram BrandOMEGACaliber1861Size12FunctionKLS-CHRVersionHandsStem= 860Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)860-1208Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.225= 861Sweep second pinion861-124396508611243401= 860Handsetting stem80263285443= 861Screw for setting lever jumper7220000241796502417