Postmark - West Berlin 1968 8pfg postal stationery card with special cancellation for Symposium of Scientists in preparation for International Astronautical Federation Congress in New York, illustrated with Rocket & Initials HOG (……Details Below

Postmark - West Berlin 1968 8pfg postal stationery card with special cancellation for Symposium of Scientists in preparation for International Astronautical Federation Congress in New York, illustrated with Rocket & Initials HOG (Hermann Oberth Society)