Original 7&1/2 x 9&1/2" concert double postcard for It's a Beautiful Day, Chuck Berry, Loading Zone, 10 Years After, Buddy Rich, Sea Train and Kimberly at the Fillmore Auditorium in San Francisco, CA on 3/19-22 and 3/12-15/1970.
 
Art by David Singer. image is #223 and 224 in the Bill Graham/Fillmore series. 
 
Postcard is in great condition.  The front and back are very clean. It has the fold crease down the middle, and 125 is written on the back in pencil. Other than edge handling, there are no other known issues.  The postcard was addressed and mailed.  It has a schedule back.