Official artist-issued (1985 commemorative) 20 x 26&1/4" hand-pulled silkscreen concert poster for Quicksilver Messenger Service appearing with Big Brother & the Holding Company (featuring Janis Joplin -her debut 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. This edition has been HAND-SIGNED and numbered 142/200 in pencil by Mouse and is currently designated RP-7 in the Eric King guide.

 Extra-thick oak-tag stock silkscreen serigraph is in BEAUTIFUL mint/near mint to near mint (A/A- to A-) condition; an absolutely STUNNING example of this limited-edition extra-large silkscreen featuring one of the most iconic images in the Family Dog series.