Rare original 12.5 x 20 poster advertising the last of the ‘Acid Test’ parties held by Ken Kesey in California during the mid-1960s. This poster depicts a superhero dressed as a graduate and advertises the “Acid Test Graduation,” to be held on Octobter 31, 1966, at the Winterland Ballroom, featuring the “Grateful Dead,” “Merry Pranksters,” “Neal Cassady,” “Caliope Co.,” “Ken Kesey,” and others. Tack and staple holes with small tears to the upper corners, and tack holes to lower corners, otherwise fine condition. Author Ken Kesey hosted the countercultural parties in 1965–66 to promote the psychedelic drug LSD, which was outlawed on October 6, 1966. To celebrate what was the end of an era, they held one last ‘graduation party,’ where diplomas were handed out to those who had frequented the events. Tom Wolfe’s classic 1968 cult book, The Electric Kool Aid Acid Test, contains a detailed account of the events. A rarely seen and extremely desirable piece of the cultural history. RR Auction COA.
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