Auction #93 Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World

1925 (May 9), Richard Byrd and Floyd Bennett Direct and Return Flight from Svalbard (Spitsbergen) to North Pole cover with mixed franking of Norway and US, tied by Ny-Alesund and Kings Bay ''9.V.25'' respectively, signed by Richard Byrd and addressed to Orange, NJ, mostly VF and rare, Est. $1,000-$1,200