Brand GRUEN Caliber 422 (SC) Size 11 1/2 Function SC Version Hands 0,65x1,20 Stem 6907 Stem (subs.) Stem (2 pce) Balance staff 30207 Balance staff (subs.) 30602 INCA Mainspring (subs.) 1,5x9,5x0,11 Mainspring (subs.) Battery