During WWII, the Germans, British, Americans, and Russians all created forged stamps or postcards of the opposing forces. Some were strictly for local propaganda purposes, while others were designed for introduction into the enemy postal systems. The Allies went so far as to devise and implement elaborate plans to introduced forged postal items into Germany.
Here's one of the more common war forgeries, the British forgery of Germany's Feldpost Airmail stamp.
The Feldpost Airmail stamp was used by German forces to get mail home more quickly than the normal Feldpost system. The original stamp:
In 1943, the British printed these forgeries.
They delivered over 200,000 to the British Special Operations Executive and 12,500 to the Free French. However, no evidence has come to light that they were ever actually used within the German Feldpost system.
The stamps are of good quality printing, but are easily distinguishable from the original German issues. They differ in paper, perforation, and have several noticeable printing differences:
- Open loop antenna - Dashes behind the rudder - Incomplete door lines