Poland
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Poland
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20 Groszy y 12 - 20 Groszy (1923)y 37 - 20 Groszy (1923) zincy 43 - 20 Groszy (1949) copper-nickely 43a - 20 Groszy (1949) aluminum *y a47- 20 Groszy (1957-1985)y 280 - 20 Groszy (1990-2016) Copper Nickely 972 c - 20 Groszy (2019 +) Copper Nickel Plated Steel
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