500 Leva Zlato Not issued

The 500 Leva Zlato series of 1920 was prepared against a gold standard that Bulgaria could not realistically sustain in the aftermath of the Second Balkan War and the First World War — two conflicts that had exhausted the country's reserves and left it on the losing side of both. The "Zlato" denomination implied convertibility into gold, a promise the Bulgarian National Bank was in no position to honour.

The notes were printed but never released. Exactly why authorization for issue was withheld is not firmly documented, though the broader fiscal instability of the period and the constraints imposed by the 1919 Treaty of Neuilly-sur-Seine provide the obvious backdrop. Survivors are rare precisely because unissued stocks were typically held in vault and destroyed administratively rather than entering any collecting channel.