I found this silver bar in the late 1970s using a Whites TR Discriminator (sold under the Sears Ted Williams name). It was found in an old barn foundation in an area that was being cleared for a housing development. The area was rumored to have been used by the underground railroad to smuggle escaped slaves to Canada before the Civil War. The silver bar appears to have been made in a sand mould, it's weight labeled in troy ounces, and I have not yet been able to identify the manufactures mark. It is silver and does weigh one pound, can anyone tell me if it is pre Civil War.