A beautiful fresh first printing of BG-91, the Bonnie MacLean designed poster advertising a series of November 1967 shows by Pink Floyd (with Syd Barrett,) Big Brother & The Holding Company (featuring Janis Joplin) and Richie Havens at the Fillmore and Winterland in San Francisco. Measuring just over 14" x 21", this poster looks as if it was printed yesterday; and is in spectacular condition, with only the most subtle small small push to the bottom left hand edge–it's barely visible. This poster comes the collection of the late Ralph J. Gleason (1917-1975;) one of the most influential jazz and pop music critics of all time. He was a central figure in the San Francisco rock scene, helped organize the Monterey Pop Festival, and co-founded Rolling Stone magazine. Bill Graham himself credited Gleason with suggesting the Fillmore Auditorium to him as a site for concerts, while the Family Dog met with Gleason at his home to discuss their idea to stage dance concerts, prior to their first show at the Longshoreman's Hall. This is a rare opportunity to obtain a poster from the personal collection of one of the key figures of the San Francisco Scene. On request, we will gladly provide a certificate of authenticity stating that this poster came from the Ralph J. Gleason Collection.