it does look like something stuck to the coin. It may be a small blob of dried glue. See if you can dislodge it with a wooden toothpick. That should provide enough pressure to remove it without damaging the coin.
ANA ID: 3203813 - CONECA ID: N-5637 Clean a coin that may be worth collecting? Please DON'T! When in doubt, leave it dirty!!
I have tried to dislodge the debris but it doesn't move nor does it have a raised edge to the spots a matter of fact it actually dips into the coin itself
Here is an overlay. But it does look like correct color to be a missing cladding. It should be a darker red in color? Check the edge of the coin. If it is that color and there is a small void on the area, it might be a peel of a clad?
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