Original 1st printing 14&1/8 x 20" concert poster for Quicksilver Messenger Service appearing along with the Sons of Champlin and Blackburn & 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 set of tack holes (all four corners), a series of thin bends/light creases running along the left/right margins, light toning, light handling wear, a set of thin horizontal roll bends traversing the image area, a thin diagonal bend in the lower left margin and a hint of corner creasing, otherwise fine.
A very nice-looking 1st printing example of this classic late-'66 Moscoso poster from the Avalon.