Dorfan, Louis Marx and Company and American Flyer. During the post-war era, Lionel was primarily competing with Louis Marx and Company and American Flyer. Models Lionel made many models, including scale models, of actual trains. The Red Comet and Blue Streak sets included models of New York Central's Commodore Vanderbilt locomotive. In 1934, Lionel made a 1:45 scale model of Union Pacific's M10000 diesel streamliner (also called the city of Denver) that runs on O gauge track. It was followed by a model of the city of Denver's successor, the city of Portland. The 763E and 700E are 1:48 scale models of 4-6-4 Hudsons. In 1938, Lionel made a model of Chicago, Burlington and Quincy Railroad's Burlington Zephyr streamliner called the Flying Yankee. Post-war era (1945–1969) Lionel resumed producing toy trains in late 1945, replacing their original product line with less-colourful, but more realistic, trains and concentrating exclusively on O-gauge trains. Many of Lionel's steam locomotives of this period, had a new feature: smoke, produced by dropping a small tablet or a special oil into the locomotive's smokestack, which contained an electric heating element. Many diesel, electric, and steam engines made after 1950 had Lionel's Magne-Traction, which made the wheels magnetic to grip the track better. Lionel's most popular toy train ever mass-produced was the Santa Fe F3, numbered 2333, released in 1948. By 1953 Lionel profits reached their highest level, during postwar, at over $32 million. During the same year, Lionel became the world's largest toy manufacturer. As the 1950s progressed, Lionel sales began to decline in proportion to the growing prevalence of space and military-themed toys and slot car racing sets — all coinciding with the decline in rail travel and the launching of Sputnik, which began the space-race between the United States and Soviet Union, along with their associated military build-up as the Cold War progressed after World War II. The remaining interest in toy and model trains that existed was geared towards HO scale, which gradually overtook O gauge in popularity due to its more realistic detailing and smaller size that enabled the enthusiast to do more modelling within the same amount of space. Lionel attempted to keep the pace with the changing trends by offering space and military-themed train sets and coming out with their own HO line of trains. Unfortunately, they were never able to reclaim the market share they once held in the