UNITAS 6599BrandUNITASCaliber6599Size13FunctionVersionHands0,90x1,50Stem8030Stem (subs.)Stem (2 pce)Balance staff31507Balance staff (subs.)31313 INCAMainspring (subs.)1,7x11,5x0,13Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8028030723Balance staff, pivoted80231313723Balance staff ST -shock-absorber80231507