Stockholm-London-Stockholm
1928 overnight mail service

During the summer of 1928 AB Aerotransport (Swedish Air Lines), together with Postmaster General (Generalpoststyrelsen) and the Swedish Air Traffic Association (Svenska Luftfartsförbundet), conducted five trial overnight flights Stockholm-Malmö-Lübeck-Hamburg-Amsterdam-London.

The first flight on June 18 was piloted by Liljegren from AB Aerotransport. The plane was also manned with the "first flying postmaster" Mr. Olav Olsen, who had to postmark, sort and bundle the airmail during the flight.

The five trips were maid:

Trip #1
June 18: Stockholm-London (arrived the in the morning of June 19).
June 20: London-Stockholm (arrived in the morning of June 21.

Trip #2
August 14: Stockholm-London (arrived the in the morning of August 15).
August 16: London-Stockholm (arrived in the morning of August 17).

Trip #3
August 22: Stockholm-London (arrived the in the morning of August 23).
August 24: London-Stockholm (arrived in the morning of August 25).

Trip #4
August 29: Stockholm-London (arrived the in the morning of August 30).
August 31: London-Stockholm (arrived in the morning of September 1).

Trip #5
September 3: Stockholm-London (arrived the in the morning of September 4).
September 5: London-Stockholm (arrived in the morning of September 6).

According the AB Aerotransport's book "20 years of air traffic 1924-1944/In Swedish: På säkra vingar) one of the five flight was disrupted in Malmö due to problems with the plane. For the moment I don't know which flight.

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Om du av någon anledning "glömmer" detta så förväntar jag mig att du på sociala medier, egna websidor eller i publikationer av olika slag, tydligt anger varifrån du tagit bilden, exempelvis www.famgus.se.
Tack!

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One of the big driving fources for the development of the early aviation was the transport of mail. Passenger services on the early flight could be made affordable as the income from the air mail covered most of the expences.

The early "experiment" with night flights between Stockholm-London 1928 was followed in 1929 (May 30 and June 28) with 22 trials flights on the routes Stockholm-Malmö-Copenhagen-Hamburg-Amsterdam and Oslo-Gothenburg-Malmö-Copenhagen-Berlin. Participating companies were ABA (AB Aerotransport), DDL (Det Danske Luftfartselskab), Deutsche Lufthansa, KLM and the Norwegian company Halle & Petersen.

In U.S.A. competion for getting early contracts with US Post Office led to the development of aviation companies. Companies that over the years through merges and buyouts led to the aviation industry we know today.

This is for me a fascinating postcard.
The picture side itself is not specific in any way, but the address side is. It has four different cancellations, together with one ink stamp stating that this is "1er Service Postal Aérien France-Etats-Unis".