Original 1st printing (OP-2 in the Eric King guide, the lighter/"money" green version) 13&7/8 x 19&7/8" concert poster for the Grateful Dead appearing with the Oxford Circle at the Avalon Ballroom in San Francisco, CA from 11/4-5/1966.
Art by Alton Kelley and Stanley Mouse, image is # 33 in the Family Dog/Avalon series.
Medium-thick flat vellum stock poster has been professionally restored to near mint to excellent (A-/B+ to B+) condition; there are filled pin/tack holes in each of the four corners and in the bottom center margin, along with a couple of tiny sealed edge tears and flattened/pressed out tiny bends in the four corners, but overall the piece looks VERY sharp/clean... really sharp restoration job, whomever did it.
A GORGEOUS lightly-restored example of the 1st printing FD 33 poster.