Civil War button? Bridle brass? Other?

[catleet]

I found this on an old farmstead south of Franklin TN in an area that I have been told was occupied during the Civil War. It appears to be brass and has a laurel wreath on the parameter of the piece. The piece is also not symetrical which makes me wonder if the differences in sides may lend a clue to its identify. Does anyone have an idea of the origins and use of this piece?View attachment 1037298

 

[Bigcypresshunter]

Is it letters?

 

[catleet]

I really don't know Bigcypresshunter. I've never been able to make it out.