Original 1st printing 13&7/8 x 21&1/8" (top/bottom edges trimmed by approximately 1/8" on each side) concert poster for Quicksilver Messenger Service appearing with Don Ellis and Rockwell at the Fillmore West in San Francisco, CA from 6/18-21/1970.

 Art by David Singer, image is # 239 in the Bill Graham/Fillmore series. 

 Medium glossy-coated index stock poster is in very good (B/B+) condition; there is a light to moderate amount of ink scuffing and surface scratching (a somewhat common trait with this poster), along with a fairly soft 3-4" horizontal bend going through "Brotherhood", a semi-soft 1" pinch crease in the left center margin, a couple of tiny corner-tip bumps and a stray soft pinch ding or two hiding within the image area, otherwise fine. 

Very nice-looking example of this late-period David Singer poster from the Fillmore West.