Viser nå: USA - Luftpostfrimerker (1918 - 2012) - 7 frimerker.
7. May VM: Ingen Perforering: 11 x 10½
15. May VM: Ingen Perforering: 10½ x 11
VM: Ingen Perforering: 11 x 10½
21. May VM: Ingen Perforering: 11
13. July VM: Ingen Perforering: 11
Viser nå: USA - Luftpostfrimerker (1918 - 2012) - 7 frimerker.
7. May VM: Ingen Perforering: 11 x 10½
15. May VM: Ingen Perforering: 10½ x 11
VM: Ingen Perforering: 11 x 10½
21. May VM: Ingen Perforering: 11
13. July VM: Ingen Perforering: 11