Now showing: United States - Postage stamps (1940 - 1949) - 11 stamps.
22. May WM: None Perforation: 11 x 10½
![[The 125th Anniversary of the First Steamship Crossing the Atlantic, type ON]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Postage-stamps/ON-s.jpg)
22. May WM: None Perforation: 11 x 10½
24. May WM: None Perforation: 11 x 10½
![[The 100th Anniversary of the First Telegraph Transmitted Message, type OO]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Postage-stamps/OO-s.jpg)
24. May WM: None Perforation: 11 x 10½
24. May WM: None Perforation: 11 x 10½
27. September WM: None Perforation: 11 x 10½
![[Corregidor Island, type OP]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Postage-stamps/OP-s.jpg)
27. September WM: None Perforation: 11 x 10½
27. September WM: None Perforation: 11 x 10½
27. September WM: None Perforation: 11 x 10½
31. October WM: None Perforation: 11 x 10½
![[The 50th Anniversary of Motion Pictures, type OQ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Postage-stamps/OQ-s.jpg)
31. October WM: None Perforation: 11 x 10½
