20 Filira - Library Trpinac Zagreb

Knjižara Trpinac was a Zagreb bookseller and stationery shop, not a financial institution — yet like dozens of Croatian merchants in 1919, it issued its own small-denomination scrip to address the acute shortage of fractional currency that followed the collapse of Austro-Hungarian monetary infrastructure. The filir, as the smallest unit of the new Kingdom of Serbs, Croats and Slovenes coinage, simply did not exist in sufficient quantity to meet everyday retail needs, so shopkeepers filled the gap themselves.

The perforation serves as the only security feature — a low bar, but these notes were never meant to circulate beyond the immediate neighborhood of a single shop.