Official promoter-issued 2nd printing 14&1/4 x 20" concert poster for Quicksilver Messenger Service appearing with Big Brother & the Holding Company (featuring Janis Joplin -her first headlining performances with BBHC) at the Avalon Ballroom in San Francisco, CA from 6/24-25/1966.

 Art by Stanley Mouse and Alton Kelley, image ("Zig-Zag Man") is # 14 in the Family Dog/Avalon series. 

 Medium-thick flat vellum stock poster is in good to very good (B to B/B+) condition; there is a single tack hole in the top center margin, along with a light to moderate amount of handling wear/light creasing, a few soft surface smudges and tiny pin-prick spots here and there, a touch of toning and a set of tape pulls covered by pieces of clear tape on the reverse side, otherwise fine.

 Overall fine-looking 2nd printing "Zig-Zag Man" poster.