of the Air Commerce Act of 1926 and December 31, 1948, all U.S. registered flying machines sported an N-number, much as they do today, the “N” being an internationally recognized identifier for the United States. During that period, however, an additional letter-identifier followed the “N.” Depending on their category, they were registered in the NC (Commercial), NG (Glider), NL (Limited), NR (Restricted, usually meaning race
