5 Gulden

Danzig's status as a Free City under League of Nations protection — carved out of the post-Versailles settlement to give Poland access to the Baltic while avoiding the outright annexation of a majority-German population — required it to maintain its own currency entirely separate from both the German Reichsmark and the Polish złoty. The Danzig gulden, introduced in 1923, was pegged to the pound sterling rather than either neighbor's currency, a deliberate political insulation that lasted until the Nazi annexation in 1939.

The .750 fine silver content was set below standard coinage purity, a concession to the city-state's limited fiscal reserves in its earliest years of monetary independence.