Original 1st printing 4x7" concert postcard for Canned Heat, Family, Red White Blues and Caste on 4/25-26/1969, ans The Stooges, Third Power, and All The Lonely People, on 4/27/1969, at the Grande Ballroom, in Detroit, MI.
 
Art by Leni Sinclair.
 
The postcard is in excellent vintage condition