Origina 7&1/2 x 9&1/2" concert double postcard for Santana, Spirit and Sly & The Family Stone, Grand Funk Railroad, Fat Matress, Southwind, Ball n'Jack, and Little Princess 109 at the Fillmore Auditorium in San Francisco, CA on 12/18-21 and 12/26-28/1969.
 
Art by David Singer. image is #207 and 208 in the Bill Graham/Fillmore series. 
 
Postcard is in great condition.  The front and back are very clean.  Other than minor handling, there are no known issues.  The postcard was addresed and mailed.  It has a schedule back.