Button?

[FingerGrime]

I found this yesterday at a site that has about a 200 year history. At first I thought it was a button...but now I'm not so sure. The reverse looks a little bit strange for a button (I think). Any help would be greatly appreciated!

Front:


Reverse:

 

[jeff of pa]

Word is Kentucky National Guard (federal service) enlisted man's collar disk, c. 1916-26.

 

[FingerGrime]

Awesome! Thanks for the help, Jeff. How did you figure that out

 

[Woodland Detectors]

Word is Kentucky National Guard (federal service) enlisted man's collar disk, c. 1916-26.

Great ID Jeff!

 

[jeff of pa]

Email from a Good Friend

 

[allen]

That is a really cool find Aaron !