Found a 1917 Buffalo nickle today in a wooded area.It was next to a tree and I couldnt get the stock coil on the Vaq centered over it , but I still was getting a nickle reading. I was searching with sens at 10, threshold on the O of Tesoro and disc all the way to the left.It sounded good and I thumbed ut up and started to cackle on nickle. It was two to three inches deep.