Now showing: United States - Airmail stamps (1918 - 2012) - 2 stamps.
15. February WM: None Perforation: 11
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![["China Clipper" over the Pacific, type M1]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/M1-s.jpg)
![["China Clipper" over the Pacific, type M2]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/M2-s.jpg)
