This is a beautiful souvenir sheet, issued by Guinea in 2007, honoring World War I fighter ace aviator Georges Guynemer. Also featured are French flying ace Pierre Clostermann, the Supermarine Spitfire British single-seat fighter aircraft, the Breguet 14A.2 French biplane bomber, the Latécoère 298 French seaplane, French aviation pioneer Didier Daurat, the Big Bertha World War I howitzer artillery weapon, and a brief written biography of Guynemer. The sheet is Post Office fresh, mint never hinged, and F/VF.