Belgium 516-525, C15-C20 blocks/4

Belgium 516-525, C15-C20 blocks of 4 with corner margin, MNH, $41.80. Michel 1100-1115. International Organizations, 1958: ILO - Labor, UN, FAO, World Bank, UNESCO, ITU, IMF - Monetary Fund, WHO, UPU, ICAO, Meteorological, Protection of Refuges, General Agreement on Tariffs and Trade, UNICEF, Atomic Energy Agency.