Hi first post here after finding something interesting. I found this item while wading in a river near the shore in about 5 inches of water. It was sitting near the surface of the substrate. I just looked down and found it. I know the river has historical importance and is near the mississippi in central minnesota and rarely has visitors. I'm guessing the design is a horizon? I thought it was stamped steel but a magnet proved it has no iron in it. I think it is silver from the black patina but I don't know. There are some sort of designs in the corners but they are covered in corosion and I don't want to try and remove it to see what the designs are. Any ideas what this is or what its purpose was.
Thanks,
Mark
Thanks,
Mark