1.American Airways & American AirlinesAmerican Airways was formed in 1930 a result of the merger of 80-90 small airlines. In 1934 the airline was re-named American Airlines and became one of the largest airlines in the world. They were responsible for the DST, Douglas Sleeper Transport, which was a wider version of the DC-2 and was intended to replace the Curtiss Condor's sleeper service. After seven DST's were built the first version of the aircraft with 21 seats came off the production line designated the DC-3 and became one of the most important planes in airline history. The early black & white litho postcards are interesting. Next came the Sepia series and finally the color Chrome postcards. I doubt the World War II code breakers could have made any sense of American's postcard numbering system. I have the cards separated by the logos on the back of the cards rather than the postcard numbers. With each back logo I have the cards listed in order by the number. Sometimes they used the same number for two different cards. American Airlines hired Ivan Dmitri, an artist and pioneer in color photography, to take some photos for the early Chrome postcards. I've identified all those using his photos. After all the company issued cards I've listed the cards made by others and then airport cards.