Thanks, feel stupid thinking strike through knowing that would have to be embedded in the coin, this looks like an upside-down triange slightly raised
That may be the "general consensus" but it doesn't make it correct. I've yet to see a wire brush "bristle" that has the shape of a brad. I seriously doubt that this retained item is from a wire brush based upon the wire brushes I've seen. Whatever it is, though, it's very cool!