Help with button ID

[gman17]

 

Amazon Forum Fav 👍

A History of Mining on the Kenai Peninsula, Alaska - Grab it through Amazon!

[duggap]

Those are called flat or coin buttons. They date back to the 1790s thru about 1830+. If you can interpret the backmark some of the folks here can tie down the date even better.

 

[gman17]

Just that I've dug hundreds of flat buttons, never seen one with a back like this.