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Rocket Mail of the WorldAustriaGraz, Austria %u2014 September 9, 1961 %u2014 EZ-36C1 %u2014 Graz Philatelic Society.Souvenir cover, with souvenir sheet of four rocket stamps. No covers were flown on this date.(text on card) The Graz Philatelic Society honors the Austrian rocket pioneer Engineer Friedrich Schmiedl.(text on souvenir sheet) 30 years ago the first postal rocket was launched to forward postal letters. In Semriach, September 9, 1931.(rubber stamp on back) The Easter Association of the Stamp Collectors%u2019 Associations. Bundestag 1961. Graz 1, September 9, 1961.
