Brand GRUEN Caliber 415 (SC) Size 10 1/2 Function SC Version Hands 0,75x1,20 Stem 6907 Stem (subs.) Stem (2 pce) Balance staff 30207 Balance staff (subs.) 30602 INCA Mainspring (subs.) 1,5x9,5x0,11 Mainspring (subs.) Battery