20 Heller Mondsee

One of thousands of Austrian Notgeld issues produced between 1919 and 1922, when the post-imperial collapse of the Austro-Hungarian monetary system left municipal authorities scrambling to fill a severe shortage of small-denomination coinage. Marktgemeinde Mondsee, a market town on the Mondsee lake in Upper Austria, issued these locally to keep daily commerce moving. The designer Reisenbichler and signatory A. Kaltenbrunner were almost certainly local figures — Notgeld at this level was a community affair, not a central banking operation.

The 20 Heller denomination places this at the lower end of practical utility for the time.