1921 (April 10-11), cover from Aleppo to Alexandretta with boxed bilingual ''Poste par Avion'' in rose lilac, franked by 3 stamps with O.M.F. surcharges on French definitives, next day arrival ds on reverse, mostly VF, Est. $250-$300 (Image)

1921 (June 30-July 4), cover from Alexandretta to Aleppo with boxed bilingual ''Poste par Avion'' in violet, franked by 6 stamps with O.M.F. surcharges, including 2pi on 25c blue in strip of five, Aleppo arrival ds on reverse, vertical fold, still F/VF, Est. $250-$300 (Image)

1924 (October 30), Pioneer Flight Damascus - Baghdad - Port Said - Cairo, registered cover from Damask to Cairo, franked by 4 air post values, appropriate transit and arrival ds on reverse, F/VF, Est. $150-$200 (Image)

1926, red Airplane bilingual surcharge 2p over black overprint ''Secours aux Réfugiés'' on 3p orange brown, vertical pair, bottom stamp without ''2'' at left variety, full OG, NH (error stamp) or LH, VF, Dallay #A31, a, C.v. €380 as singles, Est. $100-$150 (Image)

1926 (September 7-8), Pioneer Flight cover from Damascus to Baghdad, franked by 4 stamps with red airplane overprint, violet ''PAR AVION'' marking, arrival ds on reverse, F/VF, Est. $150-$200 (Image)

1934 (February 9), Airplane over Homs, bisect of 50p black used on registered cover from Al-Salihiyah, Damascus to Berkhamsted (England), blue crayon marking, registered label has been lost during delivery, arrival ''17.FEB.34'' ds on reverse, fine and scarce usage, Est. $150-$200 (Image)

1937 (January 1-4), Air France specially produced postcard delivered by Pioneer Flight Damascus - Paris, franked by three stamps, appropriate label and arrival marking, VF, Est. $100-$150 (Image)

1944, President Shukri el Kouatly, 200p and 500p, die proofs in issued and opposite colors, two for each denomination, printed on white or creamy (opposite colors) paper, full OG, NH, VF, these proofs are listed in Dallay #A111-12, €1,500, Est. $300-$400 (Image)

1947, Airplane and Sultan Ibrahim Mosque, 300p red brown, double impression, bottom left corner margin imperforated block of four, full OG, NH, VF and scarce, Est. $300-$400 (Image)

1948, Reelection of President Kouatly, imperforated souvenir sheet of four, full OG, NH, VF, C.v. $150, SG #MS467a, £275, Est. $100-$150 (Image)

1948, Military Training, imperforated souvenir sheet of four, full OG, NH, VF, C.v. $140, SG #MS471a, £225, Est. $100-$120 (Image)

1949, Colonel Husni Zayim, imperforated souvenir sheet of two, unused, no gum, VF and scarce, SG is mentioned this sheet in the footnote ''An imperforate miniature sheet containing #483/4 exists from a limited printing'', Est. $250-$300 (Image)

1949, President Husni Zayim and Map, imperforated souvenir sheet of two, full OG, NH, VF, C.v. $175, SG #MS486a, £325, Est. $150-$200 (Image)

SELECTION OF 5 PIONEER FLIGHT COVERS: 1937-39, Air France flights originated from Damascus, mainly registered covers addressed to Brussels (1937), Fiume (1937), Tunisia (1938), seaplane First Flight to Paris (1938) and First Direct Flight Beirut-Budapest (1939), nice franking, including one with complete sets #C72-79, appropriate markings, mostly VF, Est. $350-$400 (Image)