1 Perper

Montenegro printed its own emergency currency at Cetinje in 1914 — a rare case of a small Balkan state operating a functioning domestic press under wartime pressure. The Austro-Hungarian invasion later that year disrupted everything; most of these notes circulated hard and briefly before the occupation effectively ended Montenegrin monetary autonomy in early 1916.

The only security feature is an official stamp, which made forgery relatively straightforward. Surviving examples in clean condition are harder to find than the catalog frequency suggests.