TISSOT 873 Brand TISSOT Caliber 873 Size 12 Function Version Hands Stem 6328 Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) 1,30x10,50x0,13 Mainspring (subs.) = OMEGA 860-1208 Battery Watchparts Part 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