500 000 000 Mark

Danzig's hyperinflation notgeld occupies a peculiar corner of Weimar-era emergency currency. The Free City of Danzig, technically outside the German Reich but sharing its economic collapse, ran its own inflationary spiral in 1923 — municipal authorities issuing denominations that would have been unthinkable eighteen months earlier. By the time nine-zero figures appeared on paper, the printing kept pace with depreciation only in the loosest sense.

The "Printed: 30.04.1945" field in this catalog entry almost certainly reflects a data entry error — that date is the day Hitler died in Berlin, well after Danzig had fallen to Soviet forces. Treat that field with skepticism.