This was found in a friend's yard, the house and property are a little over 200 years old so I have no doubt it's been there for awhile. It is dime sized and the face looks like a seated liberty dime but the reverse is wonky. I told him I'm assuming someone hacked up the back but I wanted to see ATOTs opinion.
http://imgur.com/x1NDpGW
http://imgur.com/vgfMA5x
http://imgur.com/x1NDpGW
http://imgur.com/vgfMA5x