Brand B.F.G. Calibre 800 Size 10 1/2 Function SC Version Hands 1,10x1,80 Stem 8701 Stem (subs.) Stem (2 pce) Balance staff 4401 Balance staff (subs.) 4402 / 44701 Mainspring (subs.) 1,2x12,0x0,10 Mainspring (subs.) Battery