The 1st printing pre-dates the concert, has union logo 221 in the lower left corner, and measures 14" x 20".

The 2nd printing lacks the union logo, is on coarse porous stock and shows slight variations in the green and orange throughout the run. It was printed after the concert and measures 13 7/8" x 20".

The post-concert 3rd printing also lacks the union logo, was printed by Creative Lithograph on uncoated index, and measures 13 3/4" x 20 1/2".

When the Avalon Ballroom and Bill Graham's Fillmore Auditorium began to hold weekly dance concerts, Wilson was called upon to design the posters. He created psychedelic posters from February 1966 to May 1967, when disputes over money severed his connection with Graham. Wilson pioneered the psychedelic rock poster. Intended for a particular audience, "one that was tuned in to the psychedelic experience," his art, and especially the exaggerated freehand lettering, emerged from Wilson's own involvement with that experience and the psychedelic art of light shows.