Original 7&3/4 x 9&3/4" concert double postcard for Johnny Winter, Lonnie Mack, Rockin' Foo, Eric Burdon, It's a Beautiful Day, Cat Mother & The All Night News Boys, B.B. King, Aum, The Frost, Santana, and The Flamin' Groovies at the Fillmore and the Winterland Auditoriums in San Francisco, CA on 7/1-6 and 8-13/1969.
 
Art by David Singer. image is #180 and 181 in the Bill Graham/Fillmore series. 
 
Postcard is in excellent condition.  The front and back are very clean.  The postcard was addresed and mailed.  It has a schedule back.