I picked this up last week from Dusty Groove. According to them, it's taken or culled (as they put it) from Roulette recordings in 1958. I can't find any discographical info on it in AMG so if anybody has any, please post.
The music is hellacious. Really top quality Lockjaw and Shirley is divine. This is really worth picking up. I just noticed it's on back order. If you can pick it up. There's nothing extraordinary going on here that you haven't heard before, it's just prime playing from everybody. Very enjoyable. A highlight for me was "On the Street Where You Live" of My Fair Lady vintage.