The recording that I have of this is poor but the music is great. It is from an European Record Label. It also has 6 additional cuts.. Not retakes additional cuts. I don't know if the sounds is any better in the version Gary mentioned.
Frantz, I wouldn't say that the recording is great, but good enough that the music can shine. It's in mono, and the cuts are very abrupt, but fabulous music and great sound - good enough to bring to CES and demo with.
I know of two other versions where the sound is quite poor. I don't have the one you posted. AFAIK, due to contractual agreements, Charlie Parker can't be on the same bill as Dizzy Gillespie in the North America, so the one you have must be a European non-contracted version.