TISSOT 2180 Brand TISSOT Caliber 2180 Size 5 1/2 Function Version Hands Stem 5512 Stem (subs.) Stem (2 pce) Balance staff 27909 Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.2101977Third wheel and pinion920002101977401Winding stem8025512723Balance staff ST -shock-absorber80227909