Original  4 & 1/8 x 7 &1/8" concert postcard for Traffic, Jagged Edge, Ashmollyan Quin, Panivc & Pack and Thyme at the Grande Ballorrm in Detroit, MI on 4/12-13/1968. 
 
Art by Gary Grimshaw. 
 
Postcard is in excellent condition.  Just a few groove creases near the flower, otherwise nice.