10 Øre Grønlands Administration, overprint

When Germany occupied Denmark in April 1940, Greenland found itself administratively cut off from Copenhagen. The island's governor, Eske Brun, invoked a nineteenth-century Danish law allowing colonial governors to assume full authority in emergencies — and proceeded to run Greenland independently for the duration of the war, coordinating instead with the United States and Canada. These small overprinted cardboard pieces were part of the emergency monetary apparatus that followed.

The overprint on existing stock was the practical solution to an acute shortage of small change, not a planned issue.