Bidspirit auction | Worldwide Pioneer Flights - United

Worldwide Pioneer Flights - United States - 1931 (May-September), North Pole Flights of Wilkins - Ellsworth Trans-Arctic Submarine Expedition, three-country franking cover from New York to Dayton, OH via London, North Pole, Leningrad and New York, bearing Beacon 5c carmine and blue, uprated by GB King George V stamp of 1½p yellow brown and imperforated single of Soviet Ice-Breaker ''Malygin'' 35k green (on reverse), confirmation and other appropriate markings with arrival ds on reverse, VF, Est. $250-$300, Sc. #C11