Original 1st printing 18&1/2" diameter round concert poster for Moby Grape appearing with the Hourglass (featuring Duane and Gregg Allman) and Mt. Rushmore at the Kaleidoscope in Los Angeles, CA from 5/17-18/1968.
Art by Mortimer, image is featured in the Art of Rock book on page 280 (plate 3.78) and is # 10 in the Kaleidoscope series.
Medium-thick flat index stock poster is in absolutely fantastic near mint (A- to A-/B+) condition; a tiny machine punch hole and indentation (each about 1/32" in diameter) in the 1:00 area, a thin (nearly-invisible 3" roll bend in the bottom margin (between 5:00 and 6:00) and a touch of edge toning, otherwise fine.
FANTASTIC-looking original 1st printing Kaleidoscope poster featuring a great superhero-inspired design; check out this great informative list of shows (including this one) held at the Kaleidoscope in 1968:
http://rockprosopography101.blogspot.com/2010/04/6230-sunset-boulevard-hollywood-ca.html