There are two variations of the pre-concert 1st printing.
The 1st printing A is on coarse dull stock and has a lighter purple background. The back of this version will floresce when put under black light. It measures 14 1/4" x 20 1/16".
The 1st printing B is on plain dull stock and has a darker purple and blue background, which varies from lighter to darker throughout the print run. Also during the print run, the clarity of the photographs changed from clear to fuzzy dot screen. This version does not floresce under black light. It measures 14 3/16" x 19 15/16".
The 2nd printing is on navy blue stock that sheens under certain light, has a black Wes Wilson credit, and measures 14 3/16" x 19 15/16". It was printed in 1967, after the concert.
The 3rd printing eliminates the "Wilson" credit and measures 14 1/4" x 20 1/8". It was produced in 1974 in a print run of 5,000.