1930 (December 5), two Pioneer Flight covers to Belgian Congo, originated from Brussels or Antwerp, franked by three or four stamps, including Airplane over Ostend 5fr brown lake, appropriate arrival makings, mostly VF, suggested retail $100-$150

75.00

1935 (February 9-23), Inauguration Sabena Round Flight to Leopoldville, postcard with mixed franking of 2 Belgian and 3 Belgian Congo air post values, appropriate confirmation and arrival markings, VF, suggested retail $120-$150

75.00

1937 (August 23 - September 1), Air Mail registered cover from Brussels to US Air Mail Service New York - Cheyenne, WY via Huron, Pierre, Hot Springs (all SD) and Scottsbluff, NE, confirmation marking in lilac, arrived to NYC on August 30 and first time to Pierre on September 1, after trip completion postmarked in Pierre on April 17, 1938 (6 months later) and uprated by Washington 2c carmine, VF and very unusual mailing, suggested retail $200

100.00