Germany, German Reich: airmail labels 5

Here some very rare airmail labels from Germany!!!

Year: 1940, Ungummed, Günter Mair's catalogue no: - GER-C-37, imperforated, issued by German Air Force for official mail, black/cream, 6******

 





Year: 1942, Ungummed, Günter Mair's catalogue no: - GER-C-42, imperforated, intended for military field post Minsk - Riga, black/cream, 5*****

Year: 1942, Ungummed, Günter Mair's catalogue no: - GER-C-43, imperforated, intended for military field post Riga - Minsk, black/cream, 5*****