The 1st printing poster was printed before the concert on stock that varies slightly throughout the print run. The original poster can be identified by studying the six tiny dots on the bottom row of the smattering of dots to the left of the inside bottom right hand border. These six dots on the 1st printing are orange. There is also a white gap on the inside of the bend in the thin bright pink border directly to the right of the eye of the woman on the right. This space is not seen on the reprint. It measures 14" x 20".
The 2nd printing presents a darker pink border, and the dots described in the 1st printing differ in that they are mostly darkened in; only one or two of the dots appear orange. This post-concert reprint measures 13 15/16" x 19 7/8".
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.