The 1st printing is on vellum less than .008" thick, does not glow when placed under a black light and measures 13 15/16" x 20 3/16". The U and R in "Saturday" overlap and the A and U in "August" touch. There is a green dot in the B of "Bill" and a green slash in the T of "Tickets" that is not found in the reprints. The green ink was changed during this pre-concert press run so there is considerable variation from bright green to olive.
2nd printing A was printed after the concert on uncoated index .009" thick. The letters in Friday/Saturday/August are spaced farther apart with noticeable gaps between the A and U of "August" and the U and R of "Saturday". This version glows when placed under a black light and measures 13 3/4" x 20". It is on smoother stock, and the green and purple are darker than on the B printing.
2nd printing B is on plated stock .009" thick or thicker. This post-concert reprint shows the same letter spacing in Friday/Saturday/August as the 2nd printing A, but will not glow under a black light. The poster measures 13 7/8" x 20 1/8".