5 Pennia with center hole

Finland's wartime copper coinage continued despite severe material shortages partly because copper remained more available than the iron and tin being consumed by the war effort. The center hole — retained from earlier issues — reduced copper content per coin without requiring a redesign, a practical economy that had served Finnish coinage since the 1910s. Production ran through 1943, the year Finland was still locked in the Continuation War against the Soviet Union.