Brand MIDO Caliber 1137OC Size 12 1/2 Function Version Hands 0,90x1,50 Stem 5622 Stem (subs.) 5527 (AS 1748) Stem (2 pce) 5622 WD = NL Balance staff 27606 Balance staff (subs.) Mainspring (subs.) 1.00x10.5x0.12 AUT Mainspring (subs.) Battery