Airmail - The 150th Anniversary of the Birth of Heinrich von Stephan (Founder of U.P.U.), 1831-1897 1981
Now showing: El Salvador - Postage stamps - 1981 - Airmail - The 150th Anniversary of the Birth of Heinrich von Stephan (Founder of U.P.U.), 1831-1897 - 2 stamps.
1981
Airmail - The 150th Anniversary of the Birth of Heinrich von Stephan (Founder of U.P.U.), 1831-1897
18. May WM: None Perforation: 14½ x 14
![[Airmail - The 150th Anniversary of the Birth of Heinrich von Stephan (Founder of U.P.U.), 1831-1897, type SH]](https://swmedia-4cd6.kxcdn.com/media/catalogue/El-Salvador/Postage-stamps/SH-s.jpg)
![[Airmail - The 150th Anniversary of the Birth of Heinrich von Stephan (Founder of U.P.U.), 1831-1897, type SH1]](https://swmedia-4cd6.kxcdn.com/media/catalogue/El-Salvador/Postage-stamps/SH1-s.jpg)
