What is this coin or medallion?

[rccon3]

I am an appraiser and have never seen this coin/medallion before. I have asked several coin experts and they don't have a clue what it is.

Bob

 

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[deepsecrets]

Google Bar Kokhba coins
Bar Kokhba Coin from Clay City, Ky.

 

[Iron Patch]

I can see how that one would be tricky!