Original 1st printing 14 x 20" concert poster for the Grass Roots appearing with Big Brother & the Holding Company (pre-Janis Joplin) at the Avalon Ballroom in San Francisco, CA  from 4/29-30/1966. *shows were cancelled

 Art by Wes Wilson (central image borrowed from Franz (Von) Stuck), image ("Sin Dance") is # 6 in the Family Dog/Avalon series.

 Medium flat vellum stock poster is in near mint to excellent (A-/B+ to B+) condition; aside from a tiny nip/ding in the bottom left margin, a TINY pressure bump in the bottom right corner tip, a stray pin-prick age spot/thin stress bend or two lurking around the outer margin area and a couple of tiny pin-prick surface chips along the upper left margin, otherwise it a nearly-perfect example of this BEAUTIFUL early Family Dog poster.

To be honest, this is probably just about the nicest-looking specimen that I have come across in YEARS.