Brand NOUVELLE-TAVANNES Caliber 50 Size 10 1/2 Function Version Hands 0,90x1,40 Stem 7552 Stem (subs.) Stem (2 pce) Balance staff 31514 Balance staff (subs.) DCN 1869 Mainspring (subs.) 1,65x9,00x0,105 Mainspring (subs.) Battery