2 Kronen (CF stamp)

Fiume's 1918–1919 period produced some of the most improvised emergency currency in European history. When the city's status became contested following the post-WWI collapse of Austria-Hungary, local authorities stamped existing Austro-Hungarian Kronen notes with "CITTÀ DI FIUME" overprints to assert a distinct civic monetary identity — a political act as much as a practical one. The CF stamp series is the roughest of these issues: hand-applied, inconsistently positioned, and frequently doubled or misaligned.

D'Annunzio's subsequent seizure of Fiume in September 1919 made this entire episode even more complicated for later researchers attempting to date specific stampings.