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Rocket Mail of the WorldNetherlandsOldenzall, Netherlands %u2014 April 10, 1966 %u2014 EZ-105A1a %u2014 HOG (Herman Oberth Society).Souvenir sheet of four rocket stamps, with two stamp styles (for two flights), imperf. HOG (Herman Oberth Society) was the successor to the DRG (German Rocket Society).(border text) Space Symposium, Oldenzaal Netherlands, Hermann Oberth Gesellschaft. Members of International Aeronautical Federation. April 1966.Oldenzaal, Netherlands %u2014 October 10, 1964 %u2014 EZ-100A1a %u2014 HOG (Herman Oberth Society).Souvenir sheet of four rocket stamps, with two stamp styles (for two flights), imperf. HOG (Herman Oberth Society) was the successor to the DRG (German Rocket Society).(border text) Space Exploration Symposium Hermann Oberth Gesellschaft. Members of IAF (International Aeronautical Federation). Oldenzaal, Netherlands. October 1964.
