I can only maybe make out an eagle profile maybe or see two stars. Its pretty thin and found in an area where I have found stuff from early 1800's to civil war.
At first glance appears to be a bridle rosette that had a lead backing at one time. I cannot make out the design though. Hopefully someone can make it out.
Man, I really want to know what that is! Too big for a button, too small for a breast plate, right size for a buckle tongue but they were never lead filled (to my knowledge) and never seen a rosette that looked like that. SOMEBODY tell us what that is!!