The 1st printing of the poster is characterized by a slightly darker blue "band" that runs horizontally right below the bottom pink border. There is a little blue dot just to the left of "Moscoso". "61-1" appears in the bottom left hand corner. This original poster was printed before the concert and measures 14" x 20".

The 2nd printing of the poster omits the blue band described in the 1st printing and retains the dot to the left of Moscoso. "61-1" appears in the bottom left hand corner. This post-concert reprint is on fluorescent white stock, and it measures 14" x 20".

The post-concert 3rd printing omits the dot to the left of Moscoso. It replaces the full dash in the "61-1" in the bottom left hand side of the poster with a dot in between the numbers. It also measures 14" x 20".

Born in Spain, Victor Moscoso was the first of the rock poster artists with serious academic training and experience. At the Avalon Ballroom in San Francisco, Moscoso saw rock posters and decided that he could "make some money doing posters for those guys." In 1966, he began designing posters for the Avalon Ballroom; and under his own imprint, Neon Rose, a series for the Matrix, a San Francisco nightclub. Moscoso's style is most notable for its visual intensity, which was obtained by manipulating form and color to create optical effects. He used clashing, vibrating colors and deliberately illegible psychedelic lettering to demand attention.