Need help with this button

[21seacat]

My buddy found this today. This site has already given up 2 half reales so we know it’s an old site. Can anyone help identify this button?

 

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[CRUSADER]

Looks nice an early, someone will ID it soon. Early 1800s Military or Diplomatic?

 

[cannonball]

It look like Navy around 1812. It helps if you measure it in mm, and get a clear picture of the back mark. Alberts book page 93 has similar buttons.

 

[21seacat]

It’s 23mm

 

[Elvis]

Beautiful button, wish I could help on that one. Congrats!!

 

[Digger RJ]

Nice!!!!!! Congrats!!!!!!