Nice find! Got me beat! Oldest coin is an 1882 IH I found in a park downtown. There is a lot of history here, but it all under 30 feet of concrete! I'd love to get in a construction site after they dig the foundation, but fences, insurance claims, hard hats, way too much red tape to even try it. When they dug the hole at wolf point (where the first hotel and buildings were in Chicago) it was right by my work and all I could do was stare and salivate, but alas, no way to get the Kennedy family's permission to hunt their land.