Montre maintenant: États-Unis - Timbres-Poste (1847 - 2021) - 6502 Timbres-poste.
20. avril WM: Aucun Modèle: H. T. Wybrandi - Raue. Gravure: Bureau of Engraving & Printing. Perforation: 11
![[The 200th Anniversary of Diplomatic Relations between USA & The Netherlands, type BBN]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/BBN-s.jpg)
21. avril WM: Aucun Modèle: Bradbury Thompson. Gravure: Bureau of Engraving & Printing. Perforation: 11
![[Library of Congress, type BBO]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/BBO-s.jpg)
27. avril WM: Aucun Modèle: A. Saavedra, J. Boyd y J. Creamer. Gravure: Bureau of Engraving & Printing. Perforation: 10 vertical
![[Consumer Education - Coil stamp, type BBP]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/BBP-s.jpg)
