Adding mail signatures of airmail

Airmail signatures!

In the early days of airmail, postal services used to add a special signature or mark to indicate that a letter or package had been transported by air. These signatures were often used to authenticate the mail and to provide a record of the route it took.

Here are some examples of airmail signatures that were used in the past:

1. "Airmail" stamp: Many countries used a special airmail stamp to indicate that a letter or package had been transported by air. This stamp was often a combination of a standard postage stamp and a special airmail mark.
2. "Air Mail" cachet: Some postal services used a special cachet or sticker to mark airmail letters and packages. These cachets often featured a winged globe or other aviation-themed designs.
3. "By Air" or "Air Transport" mark: Some postal services used a simple mark or stamp to indicate that a letter or package had been transported by air. These marks often featured the words "By Air" or "Air Transport".
4. "Aeroplane" or "Aviation" mark: Some postal services used a mark or stamp featuring an airplane or other aviation-themed design to indicate that a letter or package had been transported by air.
5. "Route" or "Route Map" mark: Some postal services used a mark or stamp featuring a route map or a diagram of the flight route to indicate that a letter or package had been transported by air.

Here are some examples of airmail signatures from different countries:

• United States: The US Postal Service used a variety of airmail signatures, including the "Airmail" stamp, the "Air Mail" cachet, and the "By Air" mark.
• United Kingdom: The Royal Mail used a variety of airmail signatures, including the "Air Mail" cachet and the "By Air" mark.
• France: La Poste used a variety of airmail signatures, including the "Aviation" mark and the "Route" mark.
• Germany: Deutsche Post used a variety of airmail signatures, including the "Luftpost" mark and the "Flugpost" mark.

These are just a few examples of the many airmail signatures that were used around the world.