1 Gulden

Danzig's status as a Free City under League of Nations protection — carved out of postwar Germany by the Treaty of Versailles to give Poland access to a Baltic port without annexing a majority-German population — created an immediate practical problem: the city needed its own currency. The 1923 Gulden series was the answer, issued just as Germany's hyperinflation was obliterating the Papiermark that Danzig had been using. The timing was not accidental.

KM#145 is the first silver Gulden of the Free City, and the .750 fineness was a deliberate compromise — fine enough to hold confidence, cheap enough to actually mint in quantity.