A US Naval Officer?s Button?

[dagwood67]

Hi
I found this button metal detecting a boys academy built in 1826
This brass gold gilt coat button has the image of US Naval officers button.
The back stamp says ?EXTRA QUALITY? in a style that indicates it is mid19th century.
Does anyone know if it is, or is it a civilian copy?
Thanks

 

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[erfranks]

Nice Button, it does look period nice 2 piece

 

[dagwood67]

Nice Button, it does look period nice 2 piece

Thanks!