The 100th Anniversary of International Metrological Cooperation 1973
Now showing: Belgium - Postage stamps - 1973 - The 100th Anniversary of International Metrological Cooperation - 1 stamps.
1973
The 100th Anniversary of International Metrological Cooperation
24. March WM: None Design: Gustave Van de Woestijne y Jean Malvaux. Perforation: 11½