These coins are made of pure, un-plated zinc. The process of making a proof coin out of zinc probably imparts some kind of thin protective coating on the surface of the coin. In this case, the coating appears to have failed in numerous places, creating corrosion blisters.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis





















