UNITAS 6503-2BrandUNITASCaliber6503-2Size16 1/2FunctionVersionHands1,15x2,00Stem9026Stem (subs.)Stem (2 pce)Balance staff35706Balance staff (subs.)Mainspring (subs.)1,50x15,0x0,18Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8029026723Balance staff ST -shock-absorber80235706