Original 1st printing (*"blocked") 14 x 22&1/4" concert poster for the Grateful Dead appearing with Charlie Musselwhite and Petris at the Carousel Ballroom in San Francisco, CA from 5/30-6/1/1968.
Art by Alton Kelley, image ("Memorial") is featured in the Art of Rock book on page 179 (plate 2.160).
Medium-thin flat index stock poster is in good (B) condition; a moderate amount of handling wear (light bends) around all four edges, a 4 x 3" area of diagonal creasing in the lower left corner, a few thin pinch bends in the bottom right corner, a few well-camouflaged bends hiding within the image and a stray surface pit or two, otherwise fine.
A very presentable example of this classic Grateful Dead Carousel image from the Art of Rock book.
*This is the "blocked dates" version with the days of the week at the top of the poster blacked out with magic marker (many of the existing examples that were distributed and put up exhibit this trait).