現在展示： 美國 - 航空郵票 (1970 - 1979) - 2 郵票.
1972
The 100th Anniversary of the National Parks System
窗口管理器: 空缺 篩孔: 11
![[The 100th Anniversary of the National Parks System, 類型 BE]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/BE-s.jpg)
1972
Winter Olympic Games - Sapporo, Japan
17. August 窗口管理器: 空缺 篩孔: 11 x 10½
![[Winter Olympic Games - Sapporo, Japan, 類型 BF]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/BF-s.jpg)
