unfortunately not much. most you can do is keep at a discussion piece or let the kids play with them.i have about 4 Chinese coins that are the same and 3 of the sycee yuan bao.
You could use them to show to other collectors the difference between a real coin and the fake coin. Not everyone is as adept at telling the difference as some of our esteemed colleagues. I keep them to show to my non collecting friends who think that all of my coins are valuable .
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