Original 7&5/8 x 9&5/8" concert double postcard forThe Byrds, Fleetwood Mac, Johnny Hammond, Chicago, The Guess Who, and Seals & Crofts at the Fillmore Auditorium in San Francisco, CA on 1/2-4 and 8-11/1970
 
Art by David Singer. image is #210 and 211 in the Bill Graham/Fillmore series. 
 
Postcard is in great condition.  The front and back are very clean. There is a little bit of handling. The postcard was addresed and mailed.  It has a schedule back.