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 (1980's-era printing (*the 11 x 17" ones are ALL from the '80's) 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 near mint (A-) condition; aside from a couple of VERY well-camouflaged handling dings hiding within the image/outer margin area, it is a completely unblemished specimen in essentially UNBEATABLE shape. 

 An absolutely STUNNING example of one of the most in-demand trophy pieces in the psychedelic poster collecting universe.... no need to upgrade.

*this piece has a hidden reserve price.