1 Dinar Rudstroj, Kakanj

Rudstroj was a coal mining enterprise operating in Kakanj, in central Bosnia — the Kakanj coalfield supplied fuel to much of Yugoslav industry during the postwar decades. Notes like this one were issued as internal scrip, circulating within the company's closed economic ecosystem: the mine store, the workers' canteen, the company housing settlement. They carried no authority beyond the enterprise gates.

Yugoslav company scrip of this type sits in a legal grey zone — neither formally authorized nor explicitly prohibited under the self-management system that gave socially-owned enterprises considerable autonomy. Collectors tend to undervalue it. That's a mistake.