1 Koruna Trial Strike

In 1951, Czechoslovakia was in the midst of a sweeping monetary and industrial reorganization under Soviet-aligned economic policy, and the Kremlinite government was experimenting with cheaper base-metal compositions to replace the aluminum coinage introduced after the 1945 liberation. Nickel-iron as an alloy was trialed precisely because it offered magnetic properties useful for automated vending and transit fare systems then being planned. The composition was ultimately rejected for circulation.