Brand A.V. Caliber 390 Size 7 3/4 Function Version Hands 0,60x1,20 Stem 6815 Stem (subs.) Stem (2 pce) Balance staff 28018 Balance staff (subs.) 27714 INCA Mainspring (subs.) 1,5x7,0x0,07 Mainspring (subs.) Battery