The 1st printing poster has a 1/64" blue dot in the right margin, level with the bottom "Y" of the Family Dog logo. It was printed before the concert and measures 14" x 20".

The post-concert 2nd printing does not display the blue dot that is found on the 1st printings. It measures 13 15/16" x 20".

Rick Griffin grew up in the surfing culture of Southern California, a milieu which had a profound influence on his art. After high school, he worked on the staff of Surfer magazine and created the best-known surfing cartoon character of the time, Murphy. After his move to San Francisco in 1967, be began combining eclectic typefaces and decorative borders with brilliant colors in his concert posters. Griffin's compositions were complex without being illegible. A perfectionist, Griffin often applied dozens of overlays and redrew lettering again and again until he was satisfied. In the early 1970s, Griffin became a born-again Christian and religious themes dominated his work until his death in a motorcycle accident in 1991.