Original 1st printing 14&1/4 x 19&7/8" early 1967 fan club promotional poster for the good ol' Grateful Dead.
Art by Stanley Mouse and Alton Kelley featuring photos by Herb Greene, image ("The Golden Road to Unlimited Devotion") is featured in the Art of Rock book on page 187 (plate 2.192). *This is a 2-color (black/gold) progressive/test proof version (no blue ink)
Medium-thick flat vellum stock poster is in very good (B/B+) condition; there is a bit of moisture rippling/warping to the paper, along with a couple of semi-pronounced stress/handling bends in the upper right quadrant/corner, a few stray pin-prick ink smudges, light handling wear and a bit of age spotting on the reverse, otherwise fine.
REALLY COOL-LOOKING oddball Grateful Dead proof, first one of these I have seen!