1939, Airplane over Kabul, 20af emerald, bottom sheet margin horizontal imperforated pair (issued in 1949) and small die proof of the same value in slightly different color (bright bluish green), printed on vertically wove paper, size 37.5x20.5mm instead of 39x21mm for issued stamps, full OG, NH (imperf pair) or LH, VF, these proofs are rarely offered, Est. $100-$150 (Image)

1962-63, Animals, Flowers, Plants, Space, Sports, six imperforated complete sets in horizontal or vertical pairs, postage and air post, the total is 41 pairs, full OG, NH, VF, these imperforated stamps were issued in limited quantity, C.v. $212, Est. $75-$100 (Image)

1928, First Flight Vlone - Brindisi, black overprints on air post stamps of 1925, 5q-3fr, complete set of seven, full OG, NH, VF, Mi #162-68, €500, Est. $100-$150 (Image)

1929, red brown overprint on Airplane Crossing Mountains, 5q-3fr, complete set of seven, nicely centered, large part of OG, VF and scarce, a little over 1000 complete sets possible, each stamp expertized, C.v. $893, Mi #210-16, €1,800 as *, Est. $250-$300 (Image)

1931, First Flight Tirana - Rome, black arch overprints on air post stamps of 1930, 5q-3fr, complete set of seven, full OG, NH, VF, Mi #235-41, €275, Est. $80-$100 (Image)

1931, First Flight Tirana - Rome, black arch overprints on air post stamps of 1930, 5q-3fr, complete set of seven, blocks of four, full OG, NH, VF, C.v. $444 as hinged, Mi #235-41, €1,100 as singles, Est. $250-$300 (Image)

1946, Balkan Games at Tirana, 1q-1r, imperforated complete set of seven, all are top sheet margin singles, no gum as issued, NH, VF and scarce, Est. $100-$150 (Image)

Special Postage Due stamps. 1947, Red Cross, 1L light blue, dark blue and red, full OG, NH and fine centering, very scarce, Mi ZSM #1, C.v. €300, Est. $80-$120 (Image)

Soviet Union. HEROIC SS ''CHELYUSKIN'' VOYAGE TO NORTH POLE: 1935, Illustrated History of the Voyage, complete set of 34 postcards in a booklet, representing Expedition departure, shipwreck in ice, camping at North Pole, rescue of the Expedition by airplanes and ''red carpet welcome'' at Kremlin, some booklet repairs, cards are in perfect condition, VF and rare with 5000 sets produced, only a handful complete sets survived, Est. $1,500-$2,000 (Image)

1920, Paris issue, Eagle, 1r-15r, set of five values, each one with black horizontal ''Specimen'' overprint (type 2), full OG (minor offset on reverse of two stamps), NH, VF, Artar #600-04 S2, C.v. $750, Est. $150-$200 (Image)

1922, black surcharge 50k on imperforated 25,000r gray blue, vertical tete-beche pair with gutter in the middle, folded once between stamp and gutter, nevertheless full OG, NH, VF and extremely rare, this positional piece is not recorded in catalogs, Est. $1,200-$1,500 (Image)

1950, Costume of Vienna, 10s gray, left sheet margin imperforated block of four on grayish paper, full original vertically placed gum, NH, VF, ANK #923U, €880 as singles, Est. $200-$300 (Image)

1964, 2nd Parliamentary and Scientific Conference, 1.80s black and emerald, imperforated right sheet margin horizontal pair, full OG, NH, VF, ANK #1182U, €800 as singles, Est. $250-$300 (Image)

2000, Folks Festival, International Meeting of Rafters, 7s multi, right sheet margin horizontal imperforated pair, flawless quality in every respect, full OG, NH, VF and very rare, reportedly no more then 50 pairs possible, ANK#2359U, no value indicated, similar imperfs from the period are priced €1,500 per stamp, Est. $700-$800 (Image)

Semi - Postal issues. 1933, WIPA Philatelic Exhibition, 50g deep ultra, printed on ordinary paper, nice condition, full OG, NH, VF, C.v. $260, ANK #555, €330, Est. $100-$150 (Image)

COLLECTION ON ILLUSTRATED PAGES: 1933-99, about 250 mint and used stamps, starting with King George V stamps, then apparently complete King George VI and Queen Elizabeth II postally used sets, full OG or used, F/VF, C.v. close to $1,000, Est. $150-$200 (Image)

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)