Worldwide, Balloon & Rocketpost Balance, 1938-1983. Interesting group of mostly better items, including 1938 Poland Stratosphere flight NH & used on 2 flight covers; Cuba 1939 first rocket flight cover & semi-officials; rare German "V1 Prisoner of War Post" pamphlet; various items signed by Chuck Yeager (test pilot) including 1947 Bell XS-1 test flight photocard; 1947 Douglas test pilot Gene May "Skystream" world's fastest test flight; 1960 X-15 rocket plane flight (rare 1 of 3 carried), signed J.A. Walker, pilot; Smithsonian "Milestones of Flight " #1 (2 examples); and more, please inspect. Estimate  $500 - 750. $0