History of Aviation, Rare Stamps and Postal History of the World, Part 1
Lot 37:
1931 (June 6), Pioneer Flight by C.N.A.C. Tientsin – Beijing and then via Siberia to Europe, addressed to Great Britain, franked by seven stamps of the 2nd Peking printing, including three of $1 values, tied by special flight circular markings, bearing red Berlin Zentral Luftpostamt handstamp, vertical fold, still F/VF and rare cover, Est. $750-$1,000, Sc. #252, 263 x3, 265 x3
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