Brand TISSOT Caliber 31-1 Size 13 1/2 Function AUT Version Hands 0,60x1,25 Stem 7243 Stem (subs.) Stem (2 pce) Balance staff 28812 INCA Balance staff (subs.) Mainspring (subs.) 1,3x9,0x0,10S. Mainspring (subs.) Battery