Original 1st printing 8&1/2 x 11" concert flyer for Big Brother & the Holding Company (featuring Janis Joplin) appearing with Lee Michaels and the Oxford Circle at the Avalon Ballroom in San Francisco, CA from 12/9-10/1966.
 
 Art by Victor Moscoso, image ("Swirley Eyes") is # 38 in the Family Dog/Avalon series.
 
 Thin flat stock flyer is in excellent (B+) condition; there is a slight amount of moisture rippling/warping to the paper, along with a small pair of nip tears along the lower right margin and a couple of tiny edge/corner-tip creases/dings along the bottom margin, otherwise it is an absolutely GORGEOUS example of this oft-requested late-'66 Moscoso image from the Avalon.