Original 1st printing (blue background (*there is also a gray background version) 5" square (diamond-shaped) blank-reverse concert handbill for the Grateful Dead appearing with the Charles Lloyd Quartet and the Mystery Trend at the Rock Garden in San Francisco, CA from 3/28-4/2/1967 (dates are hand-altered/corrected (in pen) on the handbill).
Art by Michael Wood/Pyxis Studios, image is featured in the Art of Rock book on page 196 (plate 2.212).
Medium-thin flat vellum stock handbill is in good/decent (B to B/B-) condition; there are a number of fairly pronounced thin bends traversing the image area, along with a bit of edge/corner-tip wear, light toning and a few handling creases scattered around the image area, otherwise fine.
Uncommon early Grateful Dead concert artifact from a VERY short-lived and semi-obscure San Francisco venue. For the interesting back story (along with equally fascinating commentary), read HERE:
http://rockprosopography101.blogspot.com/2010/01/rock-garden-san-francisco-4742-mission.html