UNITAS 426BrandUNITASCaliber426Size18 1/2x21FunctionVersionHands1,15x2,00Stem12003Stem (subs.)Stem (2 pce)Balance staff52002 INCABalance staff (subs.)53001 SSRMainspring (subs.)2,5x16,0x0,20Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem80212003723Balance staff ST -shock-absorber80252002723Balance staff, pivoted80253001