Civil War Coat Button ??

By: r s.

Hello, Just a small find, I found with my Garrett Ace 250 here in Addison IL. Close to Salt Creek I think it might be from the civil war? Im trying to get some info on it (see photos). I think it is made out of copper it is not magnetic it is about the size of a quarter. The front has USA on it and the back just has horizontal lines. If you have any clues please let me know, and shoot an E mail to me [email protected] you in advance.Ross

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