I think the explanation is that the letter was carried from England by the KLM DC2 as far as Baghdad from where it was posted back to Scotland. I have to add that I Know B.... All about stamp collecting but it seems that on arriving in Australia that some of these special 'Covers' would then be posted by normal air mail services.
Perhaps
Al can enlighten us ?
However I do see your point
Jhieminga because one would expect the envelope to also carry a British Stamp (Which it doesn't) if my explanation is to stand scrutiny. I suppose the possibility is that the letter originated from Baghdad in the first place. (So take no notice of my previous ramblin').
What say you
Al ?
