Brass disk

[goldgrubber]

Hi T-netters,
I found this brass disk at an 1820's farm I've been hunting. It has two attachment marks on the back where a loop or pin had been attached. I can't see any other marks on it other than scratches from being in the ground. Any ideas?

 

[Broken knee]

At 2 in. I would say a horse bridle button. HH
Broken Knee

 

[goldgrubber]

Thanks, I was kinda thinking the same thing.