Hitler Skull Forgeries
In 1944, the American OSS printed this forgery of Deutsches Reich MiNr 788 as part of Operation Cornflakes.
The design is altered to include a skull and the text “Futsches Reich” instead of “Deutsches Reich”.
For more on this issue, see Propaganda and Espionage Philately, by SGM Herbert A. Friedman (Ret.).