The 1st printing poster was printed before the concert. On the left side it is trimmed along the thin white border, omitting the brown left margin of the reprint. It is on a beige stock, and the brown background ranges from light to dark. It measures 13 9/16" x 21 11/16".

The post-concert 2nd printing is also on beige stock, but this reprint has a brown left hand border, so it is wider, measuring 14" x 21 5/16". The brown background is lighter than it is on the original printing.

Trained as a commercial artist, Bob Fried came to San Francisco from New York to study at the Art Institute and work as a free-lance designer. In 1966, he began to look at the rock posters that were appearing throughout the Bay Area. Encouraged by Victor Moscoso, whom he met at the Art Institute, he began to create his own posters. He wanted to keep them simple to convey feelings of dimensional space, similar to an acid trip. Fried attempted to convey the feeling of the plasticity of time that was his experience on LSD.