Schleswig

Schleswig was a duchy on the border of Denmark and Germany, now split between the two countries.  File:Schleswig 20.A.webp|20pf value File:Schleswig MAK.jpg|Imperfs overprinted "MAK." are printer's waste File:Schleswig Zone 5.jpg|1. Zone 5ø value File:Schleswig mark zone.jpg|!. Zone 1kr value File:Schleswig CIS low A.webp|5pf official File:Schleswig mark CIS.jpg|5m official 
 * In 1920, two plebiscites were held by zone in the region. Stamps were issued inscribed SLESVIG and denominated in pfennigs and marks. Stamps were issued with overprint 1. ZONE denominated in øre and krone.
 * Officials were overprinted C·I·S on the German currency values. Forgeries exist; one point is that genuine overprints are in a very dark blue.
 * The two plebiscites resulting in the northermost part going to Denmark, the southern zones going to Germany.

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