现在展示： 美国 - （通用）邮票 (1940 - 1949) - 5 邮票.
![[横贯大陆的铁路, 类型 OM]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/OM-s.jpg)
22. 五月 窗口管理器: 空缺 筛孔: 11 x 10½
![[The 125th Anniversary of the First Steamship Crossing the Atlantic, 类型 ON]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/ON-s.jpg)
24. 五月 窗口管理器: 空缺 筛孔: 11 x 10½
![[The 100th Anniversary of the First Telegraph Transmitted Message, 类型 OO]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/OO-s.jpg)
27. 九月 窗口管理器: 空缺 筛孔: 11 x 10½
![[Corregidor Island, 类型 OP]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/OP-s.jpg)
31. 十月 窗口管理器: 空缺 筛孔: 11 x 10½
![[The 50th Anniversary of Motion Pictures, 类型 OQ]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/OQ-s.jpg)
