Since I started collecting philately from the 1920 Reunion period (Genforeningen), I have been surprised how much variation there is in this small area, consisting of only 3 x 14 stamps and only a six-month validity period for the Plebiscit stamps.
The Slesvig Plebiscit-issues come in four series:
- Plebiscites with German values
- Plebiscites with Danish values and "1. Zone" overprint
- Official stamps (Dienstmarken) used by the commission, with "C.I.S." overprint
- Unperforated plebiscites with MAK overprint. Only a few unused sheets were marked MAK for destruction (makulering), while most unused sheets stayed in the market without the MAK overprint. Also, a large part of the unused sheets were burned in a garden, after the commission had finally concluded their task and transferred power to Denmark in Zone 1.