50 Fillér

Hungary's postal savings bank — not the National Bank — issued this note during the chaotic interwar period when the country was scrambling to manage a severe coin shortage following the collapse of the Austro-Hungarian monetary system. Small-denomination paper fillérs were a stopgap, filling the void left by hoarded and disappeared metal coinage. The postal savings bank had the administrative infrastructure to distribute them efficiently through its branch network, which made it a logical, if unusual, issuing authority for emergency fractional currency.

The fillérs of this series were short-lived in practical terms — hyperinflation was already accelerating by 1921, and sub-korona denominations became economically irrelevant well before they could wear out.