Original 1st printing 14 x 20" concert poster for the Paul Butterfield Blues Band (featuring Mike Bloomfield and Elvin Bishop) appearing with Jefferson Airplane at the Fillmore Auditorium in San Francisco, CA on 4/15 and 4/17/1966 and at Harmon Gymnasium on the Campus of U.C. Berkeley on 4/16/1966. 

 Art by Wes Wilson, image ("Blues-Rock Bash") is # 3 in the Bill Graham/Fillmore series.

 Medium-thick flat vellum stock poster is in very good (B/B+) condition; there is a 2" diagonal bend in the upper left corner, along with a series of tiny surface scuffs-prick spots/scuffs and a a tiny stress crease or two hiding within the image area, a red ink streak on the "Ba" of "Bash", a few minor edge creases and a tiny tear or two lurking around the outer margin area and a bit of light staining/dirt on the reverse, otherwise it is a very presentable-looking semi-used original 1st printing example of this VERY early 1966 Bill Graham poster with a killer Wes Wilson design.