Now showing: United States - Airmail stamps (1918 - 2012) - 1 stamps.
23. June WM: None Perforation: 11
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![[Avaition Pioneers - Igor Sikorsky, 1889-1972, type CN]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Airmail-stamps/CN-s.jpg)
