1918 16c green, block of four, well centered, n.h., fresh and v.f., cat. $520 (Cat No. C2) (Image)

Cat. $520, Est.$300

1923 8c dark green, large die proof, die sunk on reduced card (125:87), v.f. and rare, cat. $4750 (Cat No. C4P1) (Image)

Cat. $4750, Est.$2,000

1931 (10 Sep) cover franked with $2.60 Zeppelin (vertical tears, one appears to be a pre-print crease), fine appearance, canceled by concentric ovals, with Bluemont departure cds alongside, addressed to the Free City of Danzig, with German Catapult cachet "Deutscher Schleuderflug 17.9.31 Dampfer Europa-Southampton"), red Berlin transit cachet at bottom, with additional (19 Sep) and Danzig arrival markings on back, fine and unusual usage of $2.60 Zeppelin on Catapult mail to Danzig, signed Gappe, with 2017 PFC (Cat No. C15) (Image)

Est.$500

1921 (6 May) Post Office Department San Francisco to Chicago, Rock Springs, Wyoming crash cover franked with 2c red, with crash cachet, the pilot A.M. Buntin was killed when his aircraft nose-dived and was destroyed by fire at Rock Springs, Wy, fine (Image)

Est.$250

1925 (15 Apr) USS "Los Angeles", two flight covers from Philadelphia to Bermuda, franked with the set of three, fine-v.f. (Cat No. C4-6) (Image)

Est.$200

1929 "Yellow Bird" first flight from Old Orchard to France, cover with 2c Rogers & Clark adhesive and French Postage Due, overall toning, signed by both pilots, fine (the French plane "Yellow Bird" (L'Oiseau Canari) set records for the longest flight over the ocean and the first French flight over the North Atlantic, 2,410 miles in 22 hours. The pilots were Jean Assolant, Rene Lefevre, and Armeno Lotti) (Image)

Est.$300

1929 (11 Mar) Salt Lake City to Rock Springs, WY, badly damaged cover addressed to Egypt with accompanying "Penalt" cover with "Air Mail, Damaged by Fire in Plane at Park City Utah, March 11, 1929" cachet, the plane encountered a blinding snowstorm while over Parley's Canyon and headed for Park City for an emergency landing but crashed a few blocks from Main Street (Image)

Est.$150

1929 (13 Sep) Pitcairn Aviation Company crash cover, New York to Atlanta, cover franked with 2c Kansas and two additional 2c, endorsed on reverse "Friday Sept. 13, 1929, In aeroplane wreck at Fort Macpherson, GA Pilot Killed and ship burned - pilot hit radio tower in fog - presented to my friend J.W. Hooks - Boyce E. Miller", fine (Image)

Est.$150

1930 (28 June) First New York-Bermuda and Return cacheted 1c post card, carried on the "Miss Columbia" and addressed to the pilot Roger Williams, numbered "24" on reverse with signatures of the pilot and crew and handwritten "Mr. Clifford, Pay to get these postmarked with arrival time", v.f., only four cards known with signatures of the whole crew (Image)

Est.$250

1930 (18 Nov) Pacific Air Transport crash cover, San Diego to Seattle, large cover from the Bank of Italy Offices in Los Angeles addressed to the U.S. National Bank of Portland, franked with 10c and 3x25c, with printed "This letter in plane crash on Northbound Flite of P.A.T. Plane on Cam #8 - Pilot F.A. Donaldson and two passengers being killed", with "Received in bad condition at Portland, Oregon" handstamp, fine (Image)

Est.$150

1931 (5 May) Pacific Air Transport crash cover, San Diego to Seattle, large cover franked with 15c and 50c, with manuscript "Damaged in airplane wreck May 5, 1931, near Burbank, Calif., A.O. Willoughby, Asst. Supt. A.M.S.", both the pilot and the co-pilot were killed in the crash, fine (Image)

Est.$150

1931 (July) New York to Istanbul Flight cover, with oval "Special Agent in Charge Dept of State" date stamp, Istanbul arrival cds and signed by the pilots John Polando and Russell Boardman, v.f., addressed to Russell Boardman, rare (Cat No. AAMC 1145) (Image)

Est.$300

1934 (30 Jan) American Airways crash cover, Albany, NY to Montreal, cover franked with 3c Washington, with bi-lingual "Damaged and Delayed by Fire" cachet, the plate was destroyed by fire just before take off and half the mail was lost, fine (Image)

Est.$150

1938 (July 10) Howard Hughes Around the World flight, postal stationery 6c legal size envelope with additional 6c franking, also French and Russian adhesives added at the prospective stops at Le Bourget and Moscow, appropriate cachets, tiny cover tear at top away from the stamps, still v.f., with the original letter from John Bergen to Harvey Evans, dated December 11, 1939 ("I am sending you herewith a cover of the Howard Hughes flight around the world. This cover was never offered for sale and was distributed to his friends only, so I am sure it will make a nice addition to your stamp collection") (Image)

Est.$500

1939 (26 Mar) Braniff Airways, Chicago to Brownsville crash cover addressed to Dallas, Tx., with "Damaged due to Air Mail Interruption near Oklahoma City, March 26, 1939", shortly after takeoff in Oklahoma City the plane caught fire and the pilot was killed, fine (Image)

Est.$150

1929 (6 Aug) LZ 127 flight cover from Lakehurst to Tokyo, paying $2.05 with 5c Beacon and 4x50c violet, cancelled by Union City departure pmks, with Round the World Flight cachet alongside, Tokyo arrival (19 Aug) below, fine (Image)

Est.$150