Help with this button...

[JWT70]

I think it's 1812 but I've never seen this kind before. Thanks.

 

Amazon Forum Fav 👍

DR.ÖTEK Metal Detector, Waterproof Gold Detector, Pinpoint & Terrain Modes, Professional Metal Detector - Grab it through Amazon!

[Mud Hut]

Looks like a U.S. Official / Diplomatic button from the 1790-1820's time frame.
They are cast brass and measure 15mm in diameter.

 

[JWT70]

This one is pewter.