History of Airplanes

Amelia Earhart was flying a Lockheed Electra 10E when she disappeared over the Pacific in 1937.
One of the first designs of the Lockheed company, the Electra was one of the first all-metal, passenger planes; its many innovations contributed to the design of the P-38 fighter.
From Aero Digest, April, 1935:
Lockheed Aircraft Corporation, Burbank, California
• Twelve-place low-wing [...]