Original 1st printing (Bindweed Press credit, yellow background) 13&7/8 x 19&7/8" conference/event poster for the Sierra Club's 10th Biennial Wilderness Conference held at the Hilton Hotel in San Francisco, CA on 4/7-9/1967.

 Art by Stanley Mouse and Alton Kelley, image (silver-background Berkeley Bonaparte 2nd printing) is featured in the Art of Rock book on page 239 (plate 2.365).

 Medium flat vellum stock poster is in good/decent (B to B/B-) condition; there are staple/pin holes in all four corners (and a few hiding within the image area), along with a few stray edge dings/tiny nip/drag tears scattered around the outer margin area, a subtle degree of toning, a moderate amount of creasing/handling with a couple of thin bends hiding within the image area, a couple of tiny puncture holes/indentations in the left center of the image area... definitely not mint, but not too bad- a fairly decent-looking example overall.