Original 1st printing 14&1/8 x 19&7/8" concert poster for Andrew Staples appearing at the Matrix in San Francisco, CA, from 9/30-10/2/1966.
Art by John H. Myers, image is featured in the Art of Rock book on page 166 (plate 2.121).
Medium-thick flat vellum stock poster is in good (B) condition; a few thin tape residue shadows along the top/bottom margins (ranging in size from about 2" to 3&1/2"), a light amount of toning, a pair of ultra-thin horizontal bends going through the center of the image, a few soft handling dings and tape marks (and a small pull) on the reverse, otherwise fine.
REALLY cool early (1966) 1st printing Matrix poster from the Art of Rock.