Original 1st printing 13&7/8 x 19&7/8" concert poster for folk-pop-rockers the Grass Roots (original Willie Fulton-fronted version) appearing with the Leaves and the Grateful Dead* at the Avalon Ballroom in San Francisco, CA from 5/27-28/1966. (*GD appeared 5/28 only)
Art by (and SIGNED in black sharpie by) Wes Wilson, image ("Hayfever") is # 10 in the Family Dog/Avalon series.
Medium-thick flat vellum flat stock poster has been professionally restored to excellent (B+) condition; both the top and bottom margins have had the paper reinforced to compensate for a pair of thin tape pulls that were on the reverse, and the left/right center margins appear to have had a bit of touch-up (presumably to cover old tape marks, but I'm not entirely certain...), but the central image area appears to be untouched, with just a couple of light/soft handling bends and a tiny stress crease or two remaining... the end result is REALLY sharp-looking. I don't know who did the restoration job on this example, but it is top-notch work.
An overall FANTASTIC-looking ARTIST-SIGNED 1st printing example of the very first Grateful Dead Avalon poster.