B.F.G. 660BrandB.F.G.Caliber660Size19FunctionVersionHandsStem9302Stem (subs.)Stem (2 pce)Balance staff59001Balance staff (subs.)Mainspring (subs.)4,8x16,0x0,21Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8029302723Balance staff ST -shock-absorber80259001