20 Dinara

By 1988, Yugoslavia's inflation rate had already exceeded 200% annually and was accelerating toward the hyperinflationary collapse that would see the dinar redenominated — lopping off zeros — in 1990. Coins of this denomination were effectively worthless in purchasing terms within months of issue, which paradoxically left many surviving in uncirculated condition simply because nobody bothered spending them when paper notes were faster to use and easier to carry in the quantities required.