Key Words:
Philatelic Etiquette, Air Mail, Postal Markings, Backstamping, First Days, Aeronautical Chronology for 1928, First Flights, Lindbergh, Charles, Hinkler, Bert, Stinson, Eddie, Haldeman, George, De Bernardi, Girardot, Cornillon, Wilkins, George Hubert, Eiel son, Carl B., Bailey, Lady Mary, Heath, Lady Mary, Kingsford-Smith, Charles, Ulm, C.T.P., Amundsen, Roald, Earhart, Amelia, Stultz, Gordon, Lunborg, Goebel, Art, Tucker, Harry, Antartic Air Expedition, Crossan, Joseph, Gaston, William, Porter, Orval, Diri