Teraz pokazywane: Stany Zjednoczone - Znaczki pocztowe (1920 - 1929) - 6 znaczki.
26. Maj WM: Żadne Perforacja: 11
![[The 150th Anniversary of Washington's Encampment at Valley Forge, typ GG]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GG-s.jpg)
13. Sierpień WM: Żadne Perforacja: 11 x 10½
![[The 150th Anniversary of the Discovery of Hawaii by Captain Cook, typ GI]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GI-s.jpg)
![[The 150th Anniversary of the Discovery of Hawaii by Captain Cook, typ GJ]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GJ-s.jpg)
20. Październik WM: Żadne Perforacja: 11 x 10½
![[The 150th Anniversary of the Battle of Monmouth, typ GH]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GH-s.jpg)
12. Grudzień WM: Żadne Perforacja: 11
![[Aeronautics Conference Issue, typ GK]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GK-s.jpg)
![[Aeronautics Conference Issue, typ GL]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GL-s.jpg)
