Original 1st printing 17 x 22" event poster, "Can You Pass the Acid Test?", Ken Kesey and the Merry Pranksters' legendary series of LSD-fueled multi-media happenings/parties held up and down the West Coast from November 1965 through October 1966. "Happeners" (participants/acts) listed on the poster include: the Fugs, Allen Ginsberg, the aforementioned Merry Pranksters, Neal Cassady, the Grateful Dead and "Roy's Audioptics" (Prankster Roy Seburn's light show).

 Art by Paul Foster (sometimes mis-credited to Norman Hartweg), image (hand-colored by Sunshine Kesey) is featured in the Art of Rock book on page 91 (plate 2.4)- this is the large-version goldenrod/yellow-orange blank (no info/unused) poster. 

 Medium-thin flat index stock poster is in decent (B/B- to B-) condition; there are a number of decent-sized tears along the top right margin/corner (with a few small areas of paper loss) and all along the right margin, a 1&1/2" tear in the upper left margin/edge (going through the "yo" of "You"), a small 3/4" wedge tear/pull in the lower right margin, a bit of handling wear, a few tiny edge tears along the left margin, a stray thin bend or two hiding within the image area and a fair amount of creasing along the top border, otherwise OK... the image area is in pretty good shape, most of the damage is limited to the outer margin area. 

 Conditional issues aside, this is probably one of the most significant pieces I have ever been able to put up for auction (11 years and counting). There is not much I can add to the importance of this piece as far as historical significance (WAY too much to go into here), but I can add that the provenance on this piece is absolutely WITHOUT QUESTION- 100% ROCK SOLID. I will gladly provide a COA detailing the lineage of this piece to the winning bidder (upon request).

 An ABSOLUTE MONSTER of a psychedelic event poster, this is where it ALL STARTED!