3" round metal disc

[Integrity3]

I am new to detecting and found this metal round disc. It was found in the same area I found some metal buttons that have been dated around 1820. Can someone tell me what it might be and how old is it. Any help would be appreciated. Thanx.

 

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[jcobb]

Neat find! I can't help

 

[John_Deere]

Can't help identify it, but I can say it looks really cool! Congratulations and HH!