Acetate - Leo Parker, Joe Pass, Barney Kessel, Pete ? (1945)

I'm not big into post war jazz nor do I have much of it on 78 or Lp. I just came across this acetate in my garage featuring some names I recognize and one I can't identify. I searched the net a bit but couldn't find much information on the tracks by these musicians. I doubt that these are recordings of some long lost unpublished sides but does anyone have information on maybe what label this was recorded for or who the bassist was?