Original 1st printing (Maron Lithograph credit) 15&1/4 x 23&1/4" concert poster for Quicksilver Messenger Service appearing with Van Morrison, Clear Light and Blue Cheer at the Earl Warren Showgrounds in Santa Barbara, CA on 9/30/1967.

 Artist unknown/not credited, medium flat vellum stock poster is in excellent (B+) condition; aside from a few soft handling dings/stress creases hiding within the image area, a slight curl to the paper from being rolled, a few light surface chips on the reverse and a couple of tiny edge/corner dings, it is a GREAT-looking example of this brightly-colored image from the Jim Salzer series; check out a great informative list of 1960's-era shows (including this one) held at the Earl Warren Showgrounds:

http://earlwarrenshowgroundsetal.blogspot.com/2010/09/earl-warren-showgrounds.html