Over the years, this has been an extremely difficult poster to properly identify. However, it now appears as if there is a dependable way to identify original FD-61 posters, as follows.

The original/first print poster has a 1/8" wide horizontal band (it looks like a shadow...a very faintly darker shade of blue than the border ink color) that runs parallel to, below and touching the lowest pink border of the poster.  This band is most visible beginning just above the "s" in "outlets" at the bottom and running to the left edge of the paper.  There is also a narrow "shadow" band that extends vertically from the aforementioned band (at a right angle) up the lower left edge of the poster.  This band measures approx.  1 1/2", or longer.  Certain colors on the first print vary from the reprint.  The background color of the insert is a navy blue (this matches the original postcard insert color), and the orange and pink are flatter/lighter than the reprint.  The posters generally have to be held side by side for these differences to be noticeable.  However, if you are able to compare one from each printing, there is no mistaking the color differences.  This poster measures approx.  14" X 20".

The second print poster, an authorized reprint, does not have the "shadow" band mentioned in the description of the first print.  The background color of the insert of this poster is more purple/indigo, and the pink and orange are deeper and more intense.  This poster carries the notation "No. 61-1", but is NOT an original poster.  Some of the second print posters have a small dot left of "Moscoso", and some do not.  This poster measures approx.  14" X 20", and was printed no later than 1968.

The original postcard was printed prior to the shows, and measures approx.  5" X 7".  It exists with two different backs (place stamp here & bulk rate).