Arctic: Byrd North Pole Flight 1926: Envelope privately carried by Byrd on the flight, bearing U.S. 2c. tied by one of two strikes of NY-Alesund “–9 V 26” c.d.s., later carried on South Pole expeditions with Byrd II 3c. on reverse cancelled by Little America Jan. 31 1934 and Jan. 30 1935 duplexes, vertical crease and roughly opened but very scarce, having been held for many years in Byrd’s personal archive. Photo. (Image1)

Arctic: Byrd North Pole Flight 1926: Real photographic card incorporating four images of aspects of the flight, endorsed on reverse “To Fred Cleverly/(Wanganui)/N.Z./from Richard W. Konter/(Ukelele Dick)/Byrd Arctic (& Antarctic Expedition” and with printed description (foxed). Also 1935 commemorative cover with Byrd II 3c. cancelled by SS “Jacob Ruppert” May 9 1935 duplex. Photo. (Image1)

Arctic: MacMillan-Byrd Expedition 1925: Envelope carried on the first leg of the expedition with purple four line “AIR MAIL/Phila - Boston/VIA/MacMillan Expedition” cachet, addressed to Boston bearing 2c. cancelled by Philadelphia Navy Yard Station June 9 duplex with Boston June 11 duplex alongside and on reverse. Photo. (Image1)

Arctic: MacMillan-Byrd Expedition 1925: Very small envelope endorsed “Via/US Navy/Plane/Lt. Com./R.E. Byrd” in red, carried and signed by Byrd, addressed to the base at Etah, Greenland with Lexington-Concord 2c. tied to reverse by one of two fine strikes of “U.S.Navy/(anchor)/Polar Expedition” cachet. Rare. Photo. (Image1)

Arctic: MacMillan-Byrd Expedition 1925: U.S. 1c. postal stationery card, cancelled by Philadelphia Navy Yard Station June 10 duplex, with typed account on reverse confirming having been carried on the attempted Polar flight, signed by both Byrd and MacMillan and with double oval “MACMILLAN AERIAL/POLAR/1925/MAIL/ARCTIC EXPEDITION” cachet in blue. Rare. Photo. (Image1)

Arctic: MacMillan-Byrd Expedition 1925: U.S. 1c. postal stationery card, cancelled by Philadelphia Navy Yard Station June 10 duplex, with typed account on reverse confirming having been carried on the attempted Polar flight, signed by both Byrd and MacMillan and with double oval “MACMILLAN AERIAL/POLAR/1925/MAIL/ARCTIC EXPEDITION” cachet in blue. Rare. The property of another vendor. Photo. (Image1)

Arctic: MacMillan-Byrd Expedition 1925: Two unused ‘homemade’ real photographic postcards showing expedition ships “Peary” and “Baudouin” respectively. Taken at Wiscasset, Maine before departure on June 20. Photo. (Image1)

Byrd Transatlantic Flight 1927: Very small envelope signed by Byrd, endorsed “Via the Airplane/”America” and addressed to London, with New York June 21 and Ver-sur-Mer July 2 c.d.s’s, resealed by Postes et Telegraphes official tape, the original adhesive washed off, and with American Embassy receiving handstamp. Also 1930 Exhibit Supply Co., Chicago advertising card showing the “America” (incorrectly cited as the plane used by Byrd for the North Pole flight). Competing for the Orteig prize for the first Trans-Atlantic flight, subsequently won by Charles Lindbergh, but delayed by a succession of problems, the “America” ditched in the sea off Caen on July 1. The mail, the first official U.S. Post Office consignment by air across the Atlantic, was duly salvaged but the mailbag had become soaked. Photo. (Image1)