Brand ETA Caliber 2457 Size 10 1/2 Function Version Hands 0,90x1,50 Stem 6310 Stem (subs.) 6334 Stem (2 pce) Balance staff 27101/ 27103 Balance staff (subs.) 28105/ 28030/ 28118 Mainspring (subs.) 1,30x10,00x0,105 Mainspring (subs.) Battery