Now showing: United States - Airmail stamps - 1963 - Postmaster General Montgomery Blair - 1 stamps.
3. May WM: None Design: Robert J. Jones Perforation: 11
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![[Postmaster General Montgomery Blair, type AP]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Airmail-stamps/AP-s.jpg)
