Original  4&5/8 x 7 concert postcard for The Grateful Dead, New Riders of The Purple Sage, and Southern Comfort, at the Fillmore West in San Francisco, CA on 6/4-7/1970. The postcard has a schedule backing.
 
Art by David Singer, image is #237in the Bill Graham/Fillmore series. 
 
Postcard is in excellent/nm condition.