Great question! Doug Spanning's article in Gridiron Greats, Vol. 8, Issue No. 25, 2009 talks about back variations and the 60 (24x2 + 12) card master set. John didn't write this article, but he mentioned to me another difference that no one discusses much - pm me if interested. John also wrote (coauthored?) an article on the players from the set similar to what Jeff did in one of my favorite net54 threads.
Last edited by TanksAndSpartans; 12-11-2017 at 06:45 PM.
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