Now showing: United States - Airmail stamps (1970 - 1979) - 21 stamps.
7. May WM: None Perforation: 11 x 10½
15. May WM: None Perforation: 10½ x 11
WM: None Perforation: 11 x 10½
21. May WM: None Perforation: 11
13. July WM: None Perforation: 11
WM: None Perforation: 11
17. August WM: None Perforation: 11 x 10½
10. July WM: None Perforation: 11
WM: None Perforation: 11
2. January WM: None Perforation: 11
29. March WM: None Perforation: 11
29. March WM: None Perforation: 11
1. November WM: None Perforation: 11
20. November WM: None Perforation: 11