B.F.G. 582-31BrandB.F.G.Caliber582-31SizeFunctionVersionHandsStem8304Stem (subs.)Stem (2 pce)Balance staff36903Balance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8028304723Balance staff ST -shock-absorber80236903