TISSOT 873BrandTISSOTCaliber873Size12FunctionVersionHandsStem6328Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)1,30x10,50x0,13Mainspring (subs.)= OMEGA 860-1208BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401= OM 860Winding stem860-11068026328443= OM 860Setting lever assembled860-110996508601109770= OM 860Mainspring860-1208965086012085443= OM 860Screw for setting lever jumper2417965024178240= OM 860Hammer bolt861-1759965086117598600= OM 321Hour counting wheel, mounted321-178896503211788