Unofficial 4th printing (San Francisco Poster Company) 14&1/2 x 20" concert poster for the Daily Flash appearing with the Rising Sons (featuring Taj Mahal and Ry Cooder), Big Brother and the Holding Company and the Charlatans at the Avalon Ballroom in San Francisco, CA from 5/6-7/1966.
 
Art by Wes Wilson, image ("Euphoria") is #7 in the Family Dog/Avalon series.
Thin flat vellum stock poster is in excellent (B+) condition; just a tiny 1/4" tear in the lower margin, one or two light creases/soft bends hiding within the image area, a couple of corner-tip bumps and a few small pressure crease indentations along the right margin, otherwise fine.