Montre maintenant: États-Unis - Timbres poste aérienne (1918 - 2012) - 2 Timbres-poste.
1972
The 100th Anniversary of the National Parks System
WM: Aucun Perforation: 11
![[The 100th Anniversary of the National Parks System, type BE]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Airmail-stamps/BE-s.jpg)
1972
Winter Olympic Games - Sapporo, Japan
17. août WM: Aucun Perforation: 11 x 10½
![[Winter Olympic Games - Sapporo, Japan, type BF]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Airmail-stamps/BF-s.jpg)
