Original 1st printing 6&1/2 x 9&3/8" 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.
Thin flat stock handbill is in good (B) condition; there is a thin diagonal 2" bend in the upper left margin/corner, along with a pair of staple hole pulls/drag tears in the upper left/right corners, small pieces of multi-colored tape on the reverse top/bottom center margin, a couple of tiny pin-prick stains in the upper left corner, a light amount of handling wear and a few stray pin-prick surface spots scattered around the outer margin area and a VERY thin horizontal bend going through "A Blues" in the upper left corner of the image, otherwise fine.
A nicely-preserved example of this VERY early Bill Graham numbered series handbill.