500 Mark

Danzig occupied a peculiar administrative position after Versailles — a Free City under League of Nations protection, neither German nor Polish, with its own currency regime. The Stadtgemeinde issued this 500 Mark note in 1922, at the peak of German hyperinflation, and the city's semi-sovereign status meant it operated parallel monetary arrangements to the collapsing Reichsmark economy on its doorstep.

The printed date of 30 April 1945 almost certainly refers to a cataloguing or inventory stamp, not the original issue — that date is the day Hitler died in Berlin and Soviet forces were closing on the city itself.