Original 1st printing 12&1/8 x 17" concert/event poster for 1st Grope For Peace, a benefit (*"to help a tribal member" -presumably for a bust) featuring the (Amazing) Charlatans appearing with Big Brother and the Holding Company (featuring Janis Joplin), Lynne Hughes, the Final Solution and Congress of Wonders at the Ark in Sausalito, CA on 12/26/1966.
Art by Stanley Mouse, image is featured in the Art of Rock book on page 171 (plate 2.130).
Medium-thin flat index stock poster is in excellent (B+) condition; just a set of tack/pin holes (all four corners), a touch of toning and a stray handling ding or two and that's ALL, folks... a REALLY sweet-looking example of this late-'66 low-run Mouse classic.