Airmail stamps of Denmark

Denmark issued ten definitive airmail stamps between 1925 and 1934 in two distinct series.

[1] The 1st series, commonly called The Plow and Airplane was first issued in June 1925.

The 1925 series comprises Denmark's 1st airmail stamps and their issue corresponded with the opening of Kastrup airport in Copenhagen and the carriage of regular airmails by Det Danske Luftfartselskab, the Danish national airline.

The 1925 series is known for several constant plate flaws that appear on the same stamp in each sheet consistently.

The issue was designed by Poul E. Johansen and engraved by Jons Britze.