Original 1st printing 8&1/2 x 11" concert flyer for rock n' roll pioneer Bo Diddley appearing with Big Brother & the Holding Company (featuring Janis Joplin) at the Avalon Ballroom in San Francisco, CA on 8/12-13/1966.
Art by Stanley Mouse (who has also HAND-SIGNED this example in black pen) and Alton Kelley, image ("Earthquake") is # 21 in the Family Dog/Avalon series.
Thin flat stock flyer is in STUNNING near mint (A- to A-/B+) condition; other than a couple of minor edge dings, a hairline scratch and a few soft pinch bends/pin-prick surface spots hiding within the image area (mostly confined to the upper right corner), this example can not be topped.
An absolutely GORGEOUS-looking ARTIST-SIGNED example of the "Earthquake" flyer.