Prezentat acum: Statele Unite (SUA) - Timbre Par Avion (1990 - 1999) - 9 timbre.
12. Octombrie WM: Niciunul Perforare: 11
![[AMERICA - Tropical Coast, Tip CU]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CU-s.jpg)
27. Aprilie WM: Niciunul Perforare: 11
![[Aviation Pioneers - Harriet Quimby & Blériot XI Monoplane, Tip CV]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CV-s.jpg)
![[Aviation Pioneers - Harriet Quimby & Blériot XI Monoplane, Tip CV1]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CV1-s.jpg)
17. Mai WM: Niciunul Perforare: 11
![[William T.Piper, Tip CW]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CW-s.jpg)
21. Iunie WM: Niciunul Perforare: 11
![[Antarctic Treaty, Tip CX]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CX-s.jpg)
12. Octombrie WM: Niciunul Perforare: 11
![[America PUAS - First Americans Crossed over from Asia, Tip CY]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CY-s.jpg)
13. Iulie WM: Niciunul Perforare: 11¼
![[William T. Piper - Hair Touches Top Edge of Design, Tip CW1]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CW1-s.jpg)
WM: Niciunul Perforare: Rouletted 11
![[Landscape - Self-Adhesive, Tip XAA]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/XAA-s.jpg)
30. Iulie WM: Niciunul Perforare: Rouletted 11
![[Landscape - Self-Adhesive, Tip XAB]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/XAB-s.jpg)