Any ideas?

[mountainplayer]

This belongs to a friend of mine. I don't have a weight or diameter, but could get both of necessary. The coin was about the same diameter as a US Nickel.

 

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[Back-of-the-boat]

O.K. here is what I have It is a Carinus tetradrachm/Roman provincial Egypt/first half 283 -spring 285 AD. Material made from is billon.I have the same coin That is why I have this info.If you google Carinus tetradrachm you will find it and a lot of others from same era.Not worth a lot just don't clean it, lessens it's value.

 

[mountainplayer]

Thank you, sir! This is just what I was hoping to see when I logged on today!