Belgien
Visar nu: Belgien - Postfrimärken (1849 - 2024) - 1 frimärken.
1973
The 100th Anniversary of International Metrological Cooperation
24. mars WM: Inga Design: Gustave Van de Woestijne y Jean Malvaux. Perforering: 11½
![[The 100th Anniversary of International Metrological Cooperation, Typ APO]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Belgium/Postage-stamps/APO-s.jpg)
