|October 1, 1940||President Paul von Hindenburg - "Luxemburg" Overprint|
|December 5, 1940||Charlotte Definitives and Views - "Rpf" Overprint|
|January 12, 1941||Winter Welfare - "Luxemburg" Overprint|
These stamps were valid for postage until January 1, 1942, after which time only regular stamps of Germany could be used to frank mail from the "district" of Luxembourg.
These pre-war Luxembourg stamps, overprinted to indicate values in German currency, were valid for postage for less than four months -- until April 1, 1941.
The "Luxemburg" overprints were applied to the German semi-postal Winter Welfare stamps of November 5, 1940. The Luxemburg overprints were valid for postage until July 1, 1941.