Aviation - The 10th Anniversary of Helicopter Mail 1958
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1958
Aviation - The 10th Anniversary of Helicopter Mail
10. February 窗口管理器: 空缺 設計: Lars Norrman. 雕版: Arne Wallhorn. 篩孔: 12¾ vertical
![[Aviation - The 10th Anniversary of Helicopter Mail, 類型 EF]](https://www.stampworld.com/media/catalogue/Sweden/Postage-stamps/EF-s.jpg)
![[Aviation - The 10th Anniversary of Helicopter Mail, 類型 EF3]](https://www.stampworld.com/media/catalogue/Sweden/Postage-stamps/EF3-s.jpg)
