UMF 24-31BrandUMFCaliber24-31Size10 1/2FunctionVersionHands1,00x1,60Stem8049Stem (subs.)Stem (2 pce)Balance staff41001Balance staff (subs.)Mainspring (subs.)1,70x10,0x0,12Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8028049723Balance staff ST -shock-absorber80241001