I hit another farm field today that once held an old school house. Only 1 coin in 2 hours but it was a good one, 1898 Barber quarter. The second site was one I detected 8 years ago with good success. I was in the area so I thought I would give it a try with the CTX. I found a 1900 Indian, 1942 Merc, 5 wheats and a 1940 German Third Reich 10 Reichspfennig. It is made of Zinc.