Esquire's 1946 All-American Jazz Band Concert
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This jazz concert was Emcee'd by Orson Welles and featured Duke Ellington & his Orchestra, the Nat "King" Cole Trio, and Woody Herman & his Orchestra. Here's an ad in Billboard http://books.google.com/books?id=cxgEAAAAMBAJ&pg=PT16
This recording is part of the Old Time Radio collection.