B.F.G. 866BrandB.F.G.Caliber866Size12FunctionSCVersionHands1,10x1,90Stem9118Stem (subs.)Stem (2 pce)Balance staff44704 / 44707Balance staff (subs.)44705 / 44709Mainspring (subs.)1,15x13,0x0,135Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8029118435/1BSpring yoke90300435866721Balance cplt. -regulated025998723Balance staff, pivoted80244705723Balance staff ST -shock-absorber80244704797Pin pallet fork for roller