Brand BUREN Caliber 1000A Size 12 1/2 Function SC-AUT Version Hands 0,90x1,50 Stem 7110 Stem (subs.) Stem (2 pce) Balance staff 31905 INCA Balance staff (subs.) Mainspring (subs.) 1.00x 9.5x0.095 AUT Mainspring (subs.) = 2436 X Battery