I had an unusual request today from a woman emailing our business. Their 8 year old son was digging around in one of the fields on their land and came across two plates buried in the field. She thought they might have fallen off a tractor in times past and gradually buried themselves. Didn't look like it to me. I was thinking possibly off an implement though. Each plate has 3 troughs in it. I told her I'd post and see if anyone else had any ideas. They wanted to let their son in on what his find was.
Here is the photo I received.
Here is the photo I received.