Τώρα εμφανίζεται Ηνωμένες Πολιτείες - Γραμματόσημα (1920 - 1929) - 6 Γραμματόσημα.
26. Μάιος WM: Κανένα Διάτρηση: 11
![[The 150th Anniversary of Washington's Encampment at Valley Forge, τύπος GG]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GG-s.jpg)
13. Αύγουστος WM: Κανένα Διάτρηση: 11 x 10½
![[The 150th Anniversary of the Discovery of Hawaii by Captain Cook, τύπος 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, τύπος GJ]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GJ-s.jpg)
20. Οκτώβριος WM: Κανένα Διάτρηση: 11 x 10½
![[The 150th Anniversary of the Battle of Monmouth, τύπος GH]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GH-s.jpg)
12. Δεκέμβριος WM: Κανένα Διάτρηση: 11
![[Aeronautics Conference Issue, τύπος GK]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GK-s.jpg)
![[Aeronautics Conference Issue, τύπος GL]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GL-s.jpg)
