An absolutely flawless first printing concert poster advertising an all-star concert featuring the Jefferson Airplane, Grateful Dead and Big Brother and the Holding Company (featuring Janis Joplin) at the Hollywood Bowl, September 15, 1967.  This poster, designated BG-81 in the Bill Graham poster series, features great psychedelic artwork by Jim Blashfield, and a photograph of the Airplane by Herb Greene.  14 7/32″ x 21 19/64, in perfect condition.