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Pioneer Flight Moscow-Koenigsberg-Berlin 1922 (September 11-15), registered cover from Moscow to Berlin (Dr. Brender's correspondences), franked by a single of 5k claret and 12 stamps of 10r carmine, yellow and gray on reverse, tied by Moscow "11.9.22" ds, violet "Mit Luftpost" and Berlin receiver of September 15, minor conveyance flaws, still F/VF, ex-G. A. Ackerman
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| Scott # 109