According to what is written on the wrapper, it appears that this catalog was received on June 18, 1972:
It is interesting that the football that came with the helmet was red, white, and blue, as this would be more appropriate for an ABA basketball than an NFL football.
Here is a look at the catalog inside the wrapper:
As I covered in one of my earliest posts on this blog, the NFL did a much better job marketing to kids through merchandising than any of the other major sports, and this wrapper provides a great example. Knowing that kids would be on the lookout for catalogs to see what kinds of things they could put on their Christmas wish list, including a NFL helmet offer on the wrapper for the catalog was one more way that the NFL was developing brand loyalty with their future customers.