I have seen an original set and those look pretty much dead on to me... but I am not 100% sure on what the differences could be about the reproduced ones, haven't heard of that until now.

Really neat to see these, they are so rare you just don't see them.

If they are worth around $5k it could be a good idea to get them authenticated by a guy like Jim Schild.

Please update us as to what happens, this is very interesting.