Dear Stamp Community Family
Here I have some overprinted hitler heads, I was not able to identify. I know there are a huge number of faked overprints around, some private issues but as well some real overprints from various countries (Germany, Italy, Austria, Czechoslovakia etc.).
Does anyone know where they come from? Or does anyone has a source where one can read whether it is a private issue or a fake?




Thanks a lot for any hint in advance.
Best regards from Switzerland
André