Stamps Category Sobres Primer Dia De Servicio

Eucharistic Congress Bogota
John Michael Anderson
XXV Inter-American Institute of Agricultural Sciences
John Michael Anderson
University of the Andes
John Michael Anderson
Latin Congress of Neurosurgery
John Michael Anderson
Alexander von Humboldt
John Michael Anderson
VIII Philatelic Expo Barranquilla
John Michael Anderson
1st Interamerican Philatelic Expo0
John Michael Anderson
Fiftieth Anniversary First Day Air postal
John Michael Anderson
Fiftieth Anniversary First Day Air postal
John Michael Anderson
25th Anniversary of the UN
John Michael Anderson