my friend found in the hole of a deep cave 6pieces of spoons and a fork with a label German Silver, with it is a medallion with engravings of a lady and a label World War II in front. At the back is United States of America 1945 but it's very blured already. At the side of it was a metal jar beatifuly fashioned. Inside it is a heavy ball greatly secured. It is a big as a small bowling ball and weight 8kilos exactly. It donot heat, nor brittle or destroyed when hammered heavily. The jar where it was put weigh 3 kilos. Bt the ball attracts magnet. They are willing to sell them. Do you guys have any idea...