What is this?I've soaked it in acetone the color doesn't change from a dull copper look.Along the edge no sign at all of a copper layer between clad.At the same time this coin weighs normal.While sitting in acetone it appears to have 1 spot on the obvesre in George's hair that looks goldish.Manganeese?Also while in acetone the reverse faintly gives off the same effect in a few places just much smaller spots.Any input as to what this is would be greatly appreciated.Thanks

