Original  4 & 5/8 x 7 & 3/4" concert postcard for Grateful Dead, Otis Rush Chicago Blues Band, and The Canned Heat Blues Band at the Fillmore Auditorium in San Francisco, CA on 2/24-26/1967. Postcard has a "place stamp here" backing.
 
Art by Wes Wilson, image is # 51 in the Bill Graham/Fillmore series. 
 
Postcard is in great near mint/mint (A/A-) condition.