Zobrazujú sa: Spojené štáty - Poštové známky (1920 - 1929) - 160 známky.
5. jún WM: nikto Perforácia: 11
![[Edison's First Lamp, typ GN]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GN-s.jpg)
![[Edison's First Lamp, typ GN2]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GN2-s.jpg)
17. jún WM: nikto Perforácia: 11
![[The 150th Anniversary of the Sullivan Expedition in NY State, typ GO]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GO-s.jpg)
![[The 150th Anniversary of the Sullivan Expedition in NY State, typ GO1]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/GO1-s.jpg)
14. september WM: nikto Perforácia: 11
![[The 135th Anniversary of the Battle of Fallen Timbers, Ohio, typ HL]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/HL-s.jpg)
19. október WM: nikto Perforácia: 11
![[Ohio River Canalization - Lock No. 5, Monogahela River, typ HM]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/HM-s.jpg)
Zobrazujú sa: Spojené štáty - Poštové známky (1920 - 1929) - 160 známky.
5. jún WM: nikto Perforácia: 11
17. jún WM: nikto Perforácia: 11
14. september WM: nikto Perforácia: 11
19. október WM: nikto Perforácia: 11