50 000 000 Marks Bad Dürkheim

Bad Dürkheim's 50-million-mark note was printed locally by J. Rheinberger during the peak of Germany's hyperinflationary collapse in 1923, when municipal and regional authorities across the Reich were forced to issue their own emergency currency — Notgeld — simply to meet payroll. By the time denominations reached eight figures, the Reichsmark had lost all practical meaning as a unit; the Rentenmark reform that November finally ended the cycle.

The embossed seal was the issuer's primary authentication device, a deliberate choice given how quickly counterfeiters exploited simpler Notgeld issues during this period.