I have no idea what it went to,but it seems to be some kind of face.I can make out chin,nose,cheek bone and jaw lines,and it almost looks like hair or some kind of helmet? on head.It is a little more than 1 1/2 wide 2 1/2 long ,about 1 inch thick iron and seems to be broken off at the neck.
I enlarged it and to me it looks like there is an X on the nose so I think it is a helmet with the nose guard not sure. Kind of like the style Brad Pitt wore in the movie that he played Achilles so maybe that is who it depicts Achilles not Brad.LOL