The 1st printing of the poster is printed on vellum, and there is an orange rectangular background behind the ticket outlet information. Both union logo #72 and a "Double Day Press" credit are on the left hand side of the rectangle. The lettering and figure are lavender. This pre-concert original measures 13" x 19 1/16".
The 2nd printing is on smooth stock and eliminates the orange rectangular strip of the 1st printing. The union logo and Double Day Press credit are also omitted. The lettering and figure are bright red in color. This rare post-concert reprint also measures 13" x 19 1/16".
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.