The Lockheed Electra 10 (not to be confused with the later Lockheed Electra II Turbo-prop) was a mid-30’s entry into the airline market with such others as the slightly larger Boeing 247 and Douglas DC-2.
The Electra was first flown in February 1934. There were a total of 149 Electras built of various models and designation. Amelia Earhart used a Lockheed 10E Electra in her around-the-world attempt in 1937. She disappeared in the South Pacific in that year.