U.S. Centennial of Flight Commission home page
TThe Junkers J.L. 6 was probably the earliest all-metal plane, built in Germany in 1919 as the F 13 and imported to the United States by John Larsen to be used as a mail plane.

The Junkers J.L. 6 was probably the earliest all-metal plane, built in Germany in 1919 as the F 13 and imported to the United States by John Larsen to be used as a mail plane.

Credits - NASA