Original 1st printing 12&1/2  x 20" concert poster for the 10/31/1966 Acid Test Graduation, which was to feature the Grateful Dead appearing with Ken Kesey, Neal Cassady and the Merry Pranksters, Anonymous Artists of America, Calliope Company and "many guests stars" at Winterland in San Francisco, CA. (*event was held at the Calliope Company warehouse, and featured everyone listed on the poster except for the Dead)

 Art by Allen "Gut" Terk, image is featured in the Art of Rock on page 194 (plate 2.209). 

 Medium-thin smooth index stock poster is in good to very good (B to B/B+) condition; there is a small 1" vertical tear along the upper right margin, along with a series of thin stress creases, hairline-thin bends and light pinch dings scattered throughout the image and outer margin area, a few tiny surface scuffs scattered around the upper right/lower left corners and a few tiny margin/corner-tip creases, otherwise OK... from a presentation standpoint, it actually looks QUITE nice.

 Absolutely EPIC 1st printing Acid Test Graduation poster, one of the better-looking examples I have seen in a LONG time (most are in REALLY rough shape). Check out AMAZING footage from the event (complete with diplomas being handed out by Neal Cassady) HERE:

https://www.youtube.com/watch?v=S-yTrm_txU0&t=4s