Postage due stamps

The Protectorate's postage-due stamps were designed by A. Erhardt; they appeared on 1 December 1939, with the 80 h and 1.20 K following on 10 June 1940. The fourteen values fall into two colour groups – the heller values from 5 to 80 h in red, the koruna values from 1 to 20 K in blue. Postage-due stamps went out of use as early as 31 October 1942, although formally valid until 31 March 1943.

Sources: Burda Auction: Protektorát ČaM – Doplatní, F. Beneš / POFIS: Protektorát Čechy a Morava 1939–1945 (katalóg, PDF)