Hong Kong Scott #1068c MNH Block UNESCO World Heritage Sites CV$22+ 434998
Afghanistan Scott #560-561 IMPERF MNH S/S UNESCO 15th ANN $$
Afghanistan Scott #558-559 IMPERF MNH S/S UNESCO 15th ANN 25p 50p CV$2+
Nicaragua Scott #C429a MNH S/S UNESCO HQ in Paris MI BL#90 CV$4+
Nicaragua Scott #818a MNH S/S UNESCO HQ Opening $$
Yemen Note after Scott #128 MNH S/S Nubian Monuments UNESCO CV$10+
Nicaragua Scott #C503a MNH S/S UNESCO 25th ANN $$
Nicaragua Scott #818a//C429a MNH S/S UNESCO HQ in Paris CV$5+