지금 보여주기: 미국 - 항공 우표 (1970 - 1979) - 2 우표.
1972
The 100th Anniversary of the National Parks System
WM: 없음 디자인: Paul Rabut 절취선: 11
![[The 100th Anniversary of the National Parks System, 유형 BE]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/BE-s.jpg)
1972
Winter Olympic Games - Sapporo, Japan
17. 8월 WM: 없음 절취선: 11 x 10½
![[Winter Olympic Games - Sapporo, Japan, 유형 BF]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/BF-s.jpg)
