Airmail - Literacy Year, The 50th Anniversary of the South American Voyage of the Airship "Graf Zeppelin", The 10th Anniversary of the First Manned Moon Landing, and The 10th Anniversary of the Moon Landing of Lunokhod 1 - Overprinted "1980 ANO DE LA ALFABETIZACION" 1980
Now showing: Nicaragua - Postage stamps - 1980 - Airmail - Literacy Year, The 50th Anniversary of the South American Voyage of the Airship "Graf Zeppelin", The 10th Anniversary of the First Manned Moon Landing, and The 10th Anniversary of the Moon Landing of Lunokhod 1 - Overprinted "1980 ANO DE LA ALFABETIZACION" - 1 stamps.
