TISSOT 31-1BrandTISSOTCaliber31-1Size13 1/2FunctionAUTVersionHands0,60x1,25Stem7243Stem (subs.)Stem (2 pce)Balance staff28812 INCABalance staff (subs.)Mainspring (subs.)1,3x9,0x0,10S.Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8027243723Balance staff ST -shock-absorber80228812