I found this on Tuesday, but it has taken me a while to clean it. I found it at the same site at which I found the old coin posted a while back:
I was trying out my new Legend today and found this coin. It was identified by Red-Coat as being a 4 dinero coin of Henry III (1390-1406). Kingdom of Castile and Leon (Spanish states). How it ended up in the fields of Central Virginia is a mystery to me.