Original 1st printing 14&1/4 x 20" concert poster for Quicksilver Messenger Service appearing with the Sons of Champlin and Blackburn and Snow at the Avalon Ballroom in San Francisco, CA from 10/28-29/1966.
 
 Art by Victor Moscoso, image ("Chicken On A Unicycle") is # 32 in the Family Dog/Avalon series.
 
 Medium-thick flat vellum stock poster is in very good (B/B+) condition; there are a series of semi-camouflaged thin vertical stress bends going through the middle of the image area, along with a few minor edge bends/creases scattered around the outer margin area, a pair of nearly-invisible horizontal roll bends along the left side of the image area, a few tiny pin-prick spots hiding within the image area and a "Lorin Gilette" distributor rubber stamp on the reverse side, otherwise fine.