Airmail - Nahakin Scientific Expedition - Issue of 1956 Overprinted "Expedicion Cientifica Nahakin Guatemala-Peru Ruta De Los Mayas" 1968
Praegu kuvatakse: Guatemala - postmargid - 1968 - Airmail - Nahakin Scientific Expedition - Issue of 1956 Overprinted "Expedicion Cientifica Nahakin Guatemala-Peru Ruta De Los Mayas" - 1 margid.