History of copper currency in Sweden - Wikipedia

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Coin, Sweden, Carl XVI Gustaf, Krona, 1988, , Copper-nickel, KM:852a

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Here are the copper coins from the 1600's. In 1620's, Sweden had adopted a dual monetary standard, one based on silver and one based on copper. The Stock Photo - Alamy

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History of copper currency in Sweden - Wikipedia

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History of coins - Wikipedia