Unknown (recent) Key-Z Productions-issued ? printing 11 x 17" 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.

 Art by Allen "Gut" Terk, image is featured in the Art of Rock on page 194 (plate 2.1209). 

 Medium-thick smooth index stock poster is in near mint (A- to A-/B+) condition; there is a tiny pressure crease along the extreme lower right margin, but that's pretty much IT.... very sharp overall. As an added bonus, this example is SIGNED by George Walker, Anonymous, Ken Babbs, Gretchen Fetchen, Simon Babbs and Zane Kesey.

While it may not be an original printing, they did a pretty good job of nailing down the bright day-glo red/orange and the resolution of the printing is tight.