A rare boxing-style Jazz concert poster advertising shows by the legendary Johnny Griffin, Max Roach, Milt Jackson and Joe Diorio at the Jazz Showcase in Chicago. This 1978 cardboard poster measures 14" x 21 1/2" and is in overall excellent condition. The Jazz Showcase was a famed Jazz club on Rush Street, and this poster is a beauty. The only Johnny Griffin or Max Roach poster we've ever seen.