Bing, Frank and Nat in radio broadcast recordings from the 40’s. While the songs are not the versions you may know, they are nonetheless great, a well worth a listen. The sound quality is fine for the age, most I am sure are sourced from 78 rpm transcription discs. BTW there is an almost identical release, but the 2 Nat tracks are replaced by Louis Armstrong tracks. The 2 releases seem to get mixed up occasionally, so be aware if you order it that you may get either one. I believe the other tracks are the same.

Louis Armstrong version: http://amzn.to/1muAYJ5