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First Catapult Round Flight to USA 1930 (July 7- September 22), mixed franking special delivery cover from Vienna, franked by five Austrian air post adhesives for delivery by catapult flight from S.S. "Bremen" to NYC, then uprated by three US air post or special delivery values for return trip from NYC to Germany with S.S. "Europa", all confirmation cachet on front and Bremerhaven arrival ds on reverse, VF and scarce cover
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| Scott # C20/28