windshield, roll-up side windows, and three-speed transmission. In 1931, GM introduced light-duty pickups for both GMC and Chevrolet targeted at private ownership. These pickup trucks were based on the Chevrolet Master. In 1940, GM introduced the dedicated light-truck platform, separate from passenger cars, which GM named the AK series. Ford North America continued to offer a pickup body style on the Ford Model 51, and the Ford Australian division produced the first Australian "ute" in 1932. In 1940, Ford offered a dedicated light-duty truck platform called the Ford F100, then upgraded the platform after World War II to the Ford F-Series in 1948. Dodge at first assumed heavier truck production from Graham-Paige, while the company produced their own light (pickup) trucks, initially on their sufficiently sturdy passenger car frames. But after switching to distinct, dedicated truck frames in 1936, Dodge/Fargo launched an extensive own truck range for 1939, marketed as the 'Job-Rated' trucks. These Art-Deco styled trucks were again continued after WW II. International Harvester offered the International K and KB series, which were marketed towards construction and farming and did not have a strong retail consumer presence, and Studebaker also manufactured the M-series truck. At the beginning of World War II, the United States government halted the production of privately owned pickup trucks, and all American manufacturers built heavy duty trucks for the war effort. In the 1950s, consumers began purchasing pickups for lifestyle rather than utilitarian reasons. Car-like, smooth-sided, fenderless trucks were introduced, such as the Chevrolet Fleetside, the Chevrolet El Camino, the Dodge Sweptline, and in 1957, Ford's purpose-built Styleside. Pickups began to feature comfort items such as power options and air conditioning. During this time, pickups with four doors, known as a crew cab, started to become popular. These pickup trucks were released in 1954 in Japan with the Toyota Stout, in 1957 in Japan with the Datsun 220, and in 1957 in America with the International Travelette. Other manufactures soon followed, including the Hino Briska in 1962, Dodge in 1963, Ford in 1965, and General Motors in 1973. In 1963, the U.S. chicken tax directly curtailed the import of the Volkswagen Type 2, distorting the market in favor of U.S. manufacturers. The tariff directly affected any country seeking to bring light trucks into the United States and effectively "squeezed smaller Asian truck companies out of the American pickup market." Over the intervening years, Detroit lobbied