Here is a look at my Helmet Buggie collection. I orginally had the idea from this old Sears catalog ad, as seen here:
And after asking around to see if anyone had some buggies they would like to sell, somebody stepped up and offered their whole set to me. Now I will not tell you what I paid, but lets say I paid a very well.
It is a complete set of teams, the only missing helmet is the Cleveland Browns (the holy grail).