The 150th Anniversary of the Birth of Heinrich von Stephan, Founder of U.P.U. - Issues of 1979 Overprinted "1831-1981 Von Stephan 330" and Surcharged 1981
Now showing: Guyana - Postage stamps - 1981 - The 150th Anniversary of the Birth of Heinrich von Stephan, Founder of U.P.U. - Issues of 1979 Overprinted "1831-1981 Von Stephan 330" and Surcharged - 1 stamps.