Space Stamps
DDR 1975 - The 275th Anniversary of the Academy of Science
Germany, Federal Republic 1971 - J. Kepler 1v
Germany, Federal Republic 1981 - Youth, optical instruments 4v
Poland 1987 - The 30th Anniversary of Space Exploration s/s
1988 The 100th Anniversary of the Adult Education Institution Urania
1974 Inauguration of Czechoslovak Satellite Telecommunications Earth Station
Switzerland 1971 - World Conference of space telecommunications 1v
Mongolia 1977 - Airmail - The 11th Anniversary of "Intercosmos" Program .