
From ebay, this is a program signed by Duke Ellington from an engagement at the "400" Restaurant (5th Avenue at 43rd Street, N.Y.). The auction states that it is from June, 1949 but, according to the current version of the Duke Ellington Itinerary, that month the orchestra was coming from a Canadian tour (starting on May 23 in Belleville and ending on June 4 in Peterborough), playing in cities such as Detroit, Wilberforce, Indianapolis, Toledo, Windsor, South Bend, Peoria and Madison, and ending with an engagement at the Riverside Theater in Milwaukee (June 23-29).

So, despite the handwritten note at the bottom left of the second photograh, you can infer that the auction text is wrong, which is confirmed by the fact that, by 1949, Joya Sherrill and Rex Stewart had long left the band (1946 and 1945, respectively). This program must be from 1945, as the Duke Ellington orchestra had an engagement at the "400" Club/Restaurant from April 4 to April 30 and then a few concerts on May).