A friend of mine gave me several lead ingots of unkown origin. The ingots are 1 1/2 x 2 1/2 x 5 1/2 inches and weigh 6 1/2 lbs each. On the top the letters "P.L.P. CO" are visable. My friend, who is in his 60s, said these had belonged to his father, who was an electrician. He has no idea what intended use was. I don't have a hardness tester, so I can't provide Brinnell numbers. Anyone have any idea what alloy I have here?