Well its the size of a quarter roughly, was found about 4 inches down in one of Wisconsins oldest fair grounds. There are so many events and shows held there it could be literally anything. It was found in one of the high traffic areas of the grounds where they also have vendor booths and the likes. I this its made of brass, I really dont want to scratch it up to find out but since you guys think its modern, I suppose a little scratch wont hurt it.