Brand VENUS Caliber 172 Size 12 1/2 Function CHR Version Hands 1,30x2,00 Stem 6602 Stem (subs.) Stem (2 pce) Balance staff 39501 Balance staff (subs.) 40005 INCA / 40701 SSR Mainspring (subs.) 1,8x10,0x0,11 Mainspring (subs.) Battery