Possible war of 1812 or older? Flat button with eagle

[DiggerKid2003]

Was going through a box of relics with my grandpa and found a small flat button with an eagle about the size of a dime. He doesn't know what it is so hopefully you can help.
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[nhbenz]

These are listed as a "U.S. Official" button, circa 1820's-1830, and I think the Alberts classification number is UU132.

 

[DiggerKid2003]

Thanks for the helpful feedback

 

[DiggerKid2003]

Also can anyone tell me the price and if it rare at all?