Aviation - The 10th Anniversary of Helicopter Mail 1958
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1958
Aviation - The 10th Anniversary of Helicopter Mail
10. februari WM: Geen Ontwerp: Lars Norrman. Graveren: Arne Wallhorn. Perforatie: 12¾ vertical
![[Aviation - The 10th Anniversary of Helicopter Mail, type EF]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Sweden/Postage-stamps/EF-s.jpg)
![[Aviation - The 10th Anniversary of Helicopter Mail, type EF3]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Sweden/Postage-stamps/EF3-s.jpg)
