Brand UNITAS Caliber 542 Size 6 3/4x8 Function SC Version Hands 0,65x1,10 Stem 5914 Stem (subs.) Stem (2 pce) Balance staff 29513 Balance staff (subs.) 29219 NCA Mainspring (subs.) 1,35x7,5x0,08 Mainspring (subs.) Battery