Brand VENUS Caliber 131 Size 6 3/4x8 Function Version Hands 0,80x1,40 Stem 7008 Stem (subs.) Stem (2 pce) Balance staff 29505 Balance staff (subs.) 29710 INCA / 30505 SSR Mainspring (subs.) 1,35x10,0x0,11 Mainspring (subs.) Battery