Original 1st printing 14 x 20" concert poster for Big Brother & the Holding Company (featuring Janis Joplin) appearing with the Sir Douglas Quintet and the Orkustra at the Avalon Ballroom in San Francisco, CA from 5/5-7/1967.
Art by Rick Griffin, image ("Motherload") is # 60 in the Family Dog/Avalon series.
Medium flat index stock poster is in very good to excellent (B/B+ to B+) condition; there are a pair of tack holes in the top center margin, along with a thin series of diagonal bends in the lower left corner/margin (the longest/most pronounced is about 5"), a few light handling bends here and there and a hint of toning, otherwise fine.
The 1st printing of this poster has been surprisingly difficult to come by in recent years.