Need help with ID

[AP552]

I found this at a 1800s house site in southeast mass. I believe its copper, rang up like a coin. I dug it about 6 inches down. Any help is appreciated.

 

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[trdking]

It could be a copper that was soldered to a now gone bracelet. If you cant see anything put it in the electro and see if anything comes up? Not much to go on here

 

[Ant]

It reminds me of a water meter dial cover.

 

[ARC]

It reminds me of a water meter dial cover.

I agree... also reminds me trench lighter cover... or some kettle whistle part.
compass cover... some other spring top type of "dealio" Yoh.