Offered is a simply superb collection of commemorative, cacheted First-Day Covers (FDC) of International Tributes to the History of Flight, offered in virtually unimprovable condition in the elegant presentation box. The complete set includes 50 postal commemorative covers, 7 ½-by-5 inches, with encased MNH (Mint Not Hinged) stamps celebrating specific notable events related to flights and airmails from all around the world along with an excellent writeup on the reverse of the cover. Produced by the Postal Commemorative Society, the FDCs feature intricate and colorful artwork on the front and are protected in individual vinyl holders and are housed in an elegant 8-square inch blue presentation box, 5 ½ inches deep, with attractive blue felt interior and silk top. Examples of events include World's first airmail flight, America's first experimental airmail flight, Flight of the Graf Zeppelin, the Wright Brothers, etc. Postal cancellations are from the following 10 countries: USA, Canada, France, Germany, Great Britain, India, Ireland, Italy, Norway, USSR. The encased MNH airmail stamps are from the following 17 countries: USA (19 airmail stamps), Central African Republic, Djibouti, France, Germany, Grenada, Hungary, India, Lesotho, Malagasy Republic, Poland, Rwanda, Chad, United Kingdom, Upper Volta, USSR and Zaire.