Original 1st printing 13&7/8 x 21" concert poster for Humble Pie, Swamp Dog and Shanti performing at the Fillmore West in San Francisco, Ca on 5/13-16/1971.
 
Art by David Singer.  Image is #280 in the Bill Graham Fillmore series.
 
The poster is in excellent condition. There is a small corner tear and some edgewear.