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 decent (B/B-) condition; there are clusters of tiny pin/staple holes in all four corners, in the top/bottom/left/right center margins and a few hiding within the image area, along with a moderate amount of edge wear/corner creasing, a small tear in the top center margin, a bit of mild paper toning, a few stray pin-prick indentations, thin bends, soft handling creases and tiny spots here and there... it definitely looks like this example was taken down from public display back in 1966.

 Conditional issues aside, still an OK-looking "vintage" example of this semi-early Family Dog poster.