TISSOT 2120 Brand TISSOT Caliber 2120 Size Function Version Hands 0,90x1,30 Stem 7238 Stem (subs.) 7810 Stem (2 pce) Balance staff 31007 Balance staff (subs.) 31603 Mainspring (subs.) 1,80x8,00x0,08 Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8027238401Aufzugwelle Ersatz8027810723Balance staff ST -shock-absorber80231007723Balance staff, pivoted80231603