Prezentat acum: Statele Unite (SUA) - Timbre Par Avion (1970 - 1979) - 2 timbre.
1972
The 100th Anniversary of the National Parks System
WM: Niciunul Perforare: 11
1972
Winter Olympic Games - Sapporo, Japan
17. August WM: Niciunul Perforare: 11 x 10½