Worldwide Pioneer Flights - China

Worldwide Pioneer Flights - China

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