On April 17, 1932, Swissair bought two Lockheed Orions, making them the second European airline to use American planes, after the Czechoslovak operator CSA purchased a Ford Trimotor in 1930. The Orion was the fastest commercial airplane of its time and was put to use on the "Express line", Zurich-Munich-Vienna. This led Lufthansa to ask Heinkel for a model that could top Orion's speed, leading to the Heinkel He 70. In 1933, the first trans-Alpine route was introduced in 1933: Zurich-Milan.