The 1st printing is identified by the presence of a small amount of pale brown ink in the top of the arrow-shaped tail that is right below the "M" in "Room". This original printing is just slightly darker than the reprint and measures 14" x 20". It was printed before the concert.
The 2nd printing lacks any brown ink in the arrow-shaped tail. It is a bit lighter in color, measures 14" x 20", and was printed after the concert.