This is a beautiful sheet of 4 stamps, issued by Togo in 2010, honoring Romanian inventor & aerodynamics pioneer Henri Coanda and commemorating the first short flight of a jet aircraft. Featured on the sheet are the Coanda-1910 biplane jet aircraft, the General Dynamics F-16 Fighting Falcon American jet fighter airliner, and the United States Air Force Boeing C-17 Globemaster III military transport aircraft. The sheet is Yvert & Tellier #2296-2299, and is Post Office fresh, mint never hinged, and F/VF.