Original 2nd printing, 14 x 22" concert poster for  Chicago, Guess Who, Seals & Crofts, and Little Princess 109, at the Fillmore Auditorium in San Francisco, CA on 1/8-11/1970. 
 
Art by, and signed by, David Singer, image is #211 in the Bill Graham/Fillmore series. 
 
The poster is in great condition.  There is a fold bend in one corner, otherwise really nice.