20 Halierov

Slovakia's aluminum coinage of 1942–43 was a direct consequence of wartime metal allocation under the Nazi-aligned Tiso government, which ceded strategic metals to German war production and substituted aluminum — then effectively a military byproduct — for everyday circulation pieces. The transition from the earlier zinc 20 halierov (KM#4) happened quickly, and aluminum examples saw genuine street use in a Slovak economy increasingly distorted by the demands of the Reich.