The 1st printing poster is blank in the left third of the blue bottom margin. It measures 17" x 22" and was printed before the concert.
The 2nd printing poster displays a "© 1969, 1992 GARY GRIMSHAW All Rights Reserved" in the left hand side of the bottom margin. It was reprinted by Ghetto Press in 1992 and measures 17 5/8" x 22 7/8".
Gary Grimshaw's talent has kept him in demand and in the spotlight in a career covering the rock scenes in Michigan and the San Francisco area. Doing much of his early work for the Detroit rock & roll band MC5, the Vietnam veteran turned anti-war activist designed his first concert poster in 1966. Working in San Francisco between 1966-70, he moved back to Michigan and settled in Motor City in 1974 where he concentrated on the local rock scene for the next 14 years. Recognized as an originator of the psychedelic poster form, Grimshaw passed away at the age of 67.