Official 1966 promoter-issued 2nd printing (union logo 221) 14 x 20" concert poster for the three-day "Batman Dance", held at the Fillmore Auditorium in San Francisco, CA from 3/18-20/1966.
Performers listed include: the Mystery Trend, Big Brother & the Holding Company (pre-Janis Joplin) and the Family Tree (3/18), Quicksilver Messenger Service, Family Tree (again) and the Gentlemen's Band (3/19) and QMS (again) with the Great Society (featuring Grace Slick) and the Skins (3/20).
Art by (and SIGNED in black sharpie by) Wes Wilson, image is # 2 in the Bill Graham/Fillmore series.
Medium flat vellum stock poser is in SUPERB near mint to excellent (A-/B+ to B+) condition; there are a pair of semi-soft diagonal bends in the upper right corner, a couple of tiny edge creases and a tiny 1/4" tear in the right center margin, a tiny bend in the lower right corner tip, a few soft handling dings running along the upper margin and a soft pinch ding or two hiding within the image area, otherwise fine.
An overall GORGEOUS ARTIST-SIGNED example of this early Bill Graham Fillmore image.