50 Markkaa

Finland introduced this denomination in 1952 partly to support the logistical demands of the Helsinki Summer Olympics, which required a surge in small-denomination coinage as the country managed an influx of foreign visitors and the associated retail pressure. The aluminium bronze composition was a deliberate post-war economy measure — nickel had been diverted heavily toward wartime coinage and remained expensive, while this alloy struck cleanly and wore acceptably in circulation.

The series ran a full decade, overlapping with Finland's gradual postwar monetary stabilization following the strains of war reparations paid to the Soviet Union, completed only in 1952.