0 a letter that is sent by aircraft, usually consisting of a single very thin sheet of paper that is folded and then stuck at the edges to form its own envelope
In the homeward direction, an air letter service has been provided and an airgraph service will also shortly be available.
Civil air letter cards and surcharged air-mail go all the way by air by this route.
Does an airgraph take longer than an air letter?
I should like an assurance on the future of the bluey—the air letter that service personnel are permitted to send to their families free of charge.
From 1933 to 1948, mandate services included airmail stamps and, as an innovation, "air letter cards".
Thereafter, the term "air letter" quickly faded from use.
There has been no change in the conveyance rate paid to airlines for the conveyance of air letters or of any other type of airmail.
Owing to the need for processing airgraphs, they take about four days longer on the average than air letters to reach their destination.
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