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German States proofs


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Billon coin (.375 Silver) in Proof? I don't think so! At this title they must add some Nickel in the alloy for stopping the copper to erupt to the surface of the coin (technology used in 1930's for making the .500 silver coins to look like .825).

As I know, the Nickel wasn't used in 1855 in coins alloy.

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