10 Kroner Heilmann type III, overprint, handwritten signature

When Germany occupied Denmark in April 1940, the Faroe Islands were simultaneously occupied by Britain — making the islands a monetary anomaly almost overnight. Danish banknotes were still technically valid, but new supplies from Copenhagen were cut off. The solution was improvised: existing Danish 10-kroner notes were overprinted and put into circulation under the authority of Færø Amt, the county administration, to function as a distinct local currency for the duration of the British occupation.

The Hilbert signature is handwritten, not printed — each note signed individually by the county official. That detail alone tells you how small the operation was.