Original 1st postcard printing  5"x7"concert postcard for Lamb, Lambert & Nuttycombe, Victoria, Jeffry Cain Pamela Poland and Tangen Friedman at the Fillmore Auditorium in California on 7/21/1970.  The postcard has a blank backing.
 
Image is #243 A-1 in the Bill Graham/Fillmore series. 
 
Medium flat vellum stock postcard is in Near Mint/Mint (A-/A) ;  a fine-looking example of this early  postcard.