Original 1st printing 14 x 23&3/4" concert poster for Howlin' Wolf appearing with Big Brother & the Holding Company (featuring Janis Joplin) and the Harbinger Complex at the Fillmore Auditorium in San Francisco, CA from 4/21-23/1967.
 
Art by Wes Wilson, image is # 60 in the Bill Graham/Fillmore series 
 
Medium-thick smooth index stock poster is in very good to excellent (B/B+ to B+) condition; there is a 1&1/2" crescent-shaped crease with a 1/2" bendin the upper margin area (jusrt above the girl's head), along with a soft pinch bend/crease in the top margin just above "Francisco", a 1/2" diagonal bend in the upper left corner, a couple of tiny corner-tip bumps and a small 1" horizontal roll bend along the lower right margin, otherwise it is a mostly-clean example of this sweet mid-'67 Wes Wilson image from the Fillmore.