UNITAS 439BrandUNITASCaliber439Size18 1/2x21FunctionVersionHands1,15x2,00Stem12003Stem (subs.)Stem (2 pce)Balance staff40704 INCABalance staff (subs.)41501 SSRMainspring (subs.)2,0x16,5x0,20Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem80212003723Balance staff, pivoted80241501723Balance staff ST -shock-absorber80240704