UNITAS 247BrandUNITASCaliber247Size18 1/2-21FunctionVersionHands1,15x2,00Stem9026Stem (subs.)Stem (2 pce)Balance staff35803Balance staff (subs.)37001Mainspring (subs.)1,5x17,0x0,21Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8029026723Balance staff, pivoted80237001723Balance staff ST -shock-absorber80235803