1926, Spain. Original artist's drawing for the 30c value of the Red Cross airmail series showing "Airplane and Map of Madrid-Manila Flght". Gouache and pen on paper mounted on card. Size (netto) 203x118 mm. UNIQUE ARKWORK. (Mi #317) (M) (Tax Method: Margin System) (Image)

1928, Latvia. Original artist's drawing for the 15s value of the airmail series showing "Airplane over Riga". Gouache on paper (triangle) mounted on card. Overall size 220x303 mm. UNIQUE ARKWORK. (Mi #130) (M) (Tax Method: Margin System) (Image)

1977, Comoro Islands. Complete imperforate sheet of 28 stamps showing "Concorde, Zeppelin and UN stamp #32". Each stamp with gold overprint "Paris - New York 22. Nov. 1977". Mint, NH. (M) (Tax Method: Margin System) (Image)

1979, St. Thomas and Prince Islands. Lot of 6 artworks for the complete HISTORY OF AVIATION series showing "Wright Flyer I", "Sikorsky VS 300", "Spirit of St. Louis", "Dornier DO X", "Fairey III D" and "Space Shuttle". All acrylic on card with inscription overlay. Netto size is about 150x95 mm each. UNIQUE! (Mi. 592/97) (M) (Tax Method: Margin System) (Image)