Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - United States - 1927 (April 30), The Hubert Wilkins Alaska - North Pole Round Flight via Svalbard (Spitsbergen), pre-printed cover from Barrow (now Utqiagvik), franked by White Plains Battle 2c carmine, violet Expedition marking and manuscript reads: ''12,000 miles over Arctic by airplane, 100 miles on foot to Shore'', Fairbanks ''1927. May. 16'' arrival marking, mounted on page from a Collection, mostly VF, Est. $400-$500, Sc. # 629