Hello, I’m new to metal detecting and have been at it about a week. So far found 30+ wheats with the oldest being 1913. Also found 2 mercury dimes a 41 and 42. The strangest thing was a Philippines 1 centavos from 1930, no idea how that got into our farm yard in central Ky. All this has been in a 30’ x 30’ area in front of our house. What I need help with is this round heavy puck like item. I’m guessing lead? Any idea what it’s for?