1910 (August 3), black-and-white postcard representing Jan Olieslagers and his Henry Farman aircraft, text reads: ''Two weeks Aviation in Stockel'', sent from Brussels to Renaux, franked by 5c yellow green, appropriate markings, minor facial abrasions, still F/VF, Est. $100-$150 (Image)

1910 (August 4), black-and-white PPC representing aviator Nicholas Kinet with his Henry Farman aeroplane, text reads: ''Aviator Kinet died in August 3, 1910, because of fell down from 250 meters'', sent on August 4 (one day after his death) from Stockel (the place where the tragedy happened) to Brussels, franked by 1c gray, VF and rare, Est. $250-$300 (Image)

1912 (September 13-14), black-and-white postcard (Louis Poulhan with his Biplane), sent from Tamise to Jemelle, franked by 1c orange, arrival ds on reverse, VF, Est. $100-$150 (Image)

1913 (August), two postcards from International Exhibition in Ghent, specially produced Exhibition card sent from Ostend to Hamburg, the other one is unused, representing Canadian Pavilion and Curtiss Aeroplane, bearing the Exposition label in brown red, both are VF and scarce, Est. $150-$200 (Image)

1919 (April 13), black-and-white postcard (Military Biplane appearing to be a Curtiss Machine), sent free-frank from Brussels to Ghent, the same day arrival is alongside, VF, Est. $100-$150 (Image)

1923 (January 26), illustrated stationery postcard 15c green, representing M. Louis Franck, Belgian Colonial Minister in ''Roi Albert'' seaplane, sent from Elisabethville to Brussels, VF and scarce, Est. $100-$150 (Image)

1926 (February 12-13), Inauguration Flight Katanga - Bas-Congo, registered cover from Bukama, addressed to Antwerp, franked by five Belgian Congo adhesives, black confirmation marking, Leopoldville transit (13.2) and Antwerp arrival ds, VF, Est. $150-$200 (Image)

1934 (June 3 and July 1), cover and postcard sent from Aviation Exhibitions in Brussels and Antwerp respectively, each one franked by two stamps, including Airplane over Ostend 50c blue and bearing poster stamp from exact Exhibition, addressed to Paris or Berlin, all appropriate markings, VF, Est. $150-$200 (Image)

1935, Sabena First Round Flights two mixed franking pre-printed covers, first one (February 23-March 8) on line Brussels-Leopoldville- Brussels, the other one (November 15-29) on line Brussels-Elisabethville- Brussels, each one franked by 5 Belgian and Belgian Congo air post stamps, appropriate flight cachet and arrival markings, VF, Est. $150-$200 (Image)

1938 (April 30 - May 7), real photo Aeronautic Propaganda PPC (King Leopold III with his military aircraft) in fact maximum card with King Leopold stamp 35c+5c green is affixed over, sent by round flight Brussels-Tripoli-Brussels, uprated by Libya 50c and 1L (#C32-33), appropriate markings, VF, Est. $100-$150 (Image)

GROUP OF 21 AERIAL POSTAL HISTORY ITEMS: 1930-46, First or Pioneer Flights, representing 8 from Belgium, 1 with mixed franking of Belgium and Belgian Congo and 12 of Belgian Congo, most interesting are Elisabethville (Belgian Congo) to Madagascar (1931), Brussels to Mozambique (1934), Brussels to Bangi (French Equatorial Africa) via Marseille and Brazzaville (1935), Leopoldville to Johannesburg (1941) and many others, some conveyance faults possible, important items are all right, F/VF overall, Est. $500-$600 (Image)