Now showing: United States - Postage stamps (1950 - 1959) - 155 stamps.
27. August WM: None Design: R. Foster. Engraving: Bureau of Engraving & Printing. Perforation: 10½ x 11
![[Petroleum industry, type WK]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/WK-s.jpg)
14. September WM: None Design: C. Carter. Engraving: Bureau of Engraving & Printing. Perforation: 11 x 10½
![[Dental Health, type WL]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/WL-s.jpg)
29. September WM: None Design: Arnold J. Copeland, Ervine Metzi y W. H. Buckley. Engraving: Bureau of Engraving & Printing. Perforation: 10½ x 11 and 11
![[Champion of Liberty - Ernst Reuter, type WM]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/WM-s.jpg)
![[Champion of Liberty - Ernst Reuter, type WN]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/WN-s.jpg)
3. December WM: None Design: Charles Ransom Chickering. Engraving: Bureau of Engraving & Printing. Perforation: 10½ x 11
![[Dr. Ephraim McDowell, type WO]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/WO-s.jpg)
