Praegu kuvatakse: Ühendriigid - lennuposti margid (1918 - 2012) - 2 margid.
1972
The 100th Anniversary of the National Parks System
WM: mitte ükski perforatsioon: 11
![[The 100th Anniversary of the National Parks System, Tüüp BE]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/BE-s.jpg)
1972
Winter Olympic Games - Sapporo, Japan
17. august WM: mitte ükski perforatsioon: 11 x 10½
![[Winter Olympic Games - Sapporo, Japan, Tüüp BF]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/BF-s.jpg)
