the third rail guards, had to be temporarily removed while other obstacles were passed at a crawl to reach the fairgrounds. S1 was towed (facing backward) by smaller freight engines like PRR Ils and took a round-about route to the fair site. She ran up the Bel-Del, interchanged with the Lehigh and Hudson River Railway at Belvidere and NH at Maybrook. The S1 traveled over the Poughkeepsie and Hell Gate Bridge, crossed over the Hudson River and then brought it across on the NY Connecting. On March 13, 1939, the S1, lettered “American Railroads” on the tender, arrived at New York World's Fair. At the Fair, the drive wheels operated under the locomotive's steam power ran continuously on the roller platform at 60 mph (97 km/h) all day long. Film footage shows that all the wheels on S1, besides the drive wheels, were also placed on rollers powered by electricity; every time S1 started its performance by moving the drive wheels, all the wheels were rolling, including the wheels on the tender's truck. The World's Fair was open for two seasons, from April to October each year, and was officially closed on October 27, 1940. During the five-month break between October 1939 and April 1940, No. 6100 was put back on the system for passenger service and road testing. There is photo evidence showing that the S1 was hauling the Manhattan Limited, a named train serving as an alternative to the Broadway Limited, in November 1939. Popular Mechanics described S1 as the "Pride of American Railroad" in an article in their June 1939 issue. The New York World's Fair of 1939 attracted nearly 25 million visitors, S1's first 50,000 service mile was accumulated from this fair's live steam show. After the World's Fair, the S1 was re-lettered for the Pennsylvania Railroad fleet. As one of the most important exhibits of the World's Fair, S1 was used by the PRR for various publicity purposes; her image was featured in calendars, stamps, advertisements, brochures, puzzles, etc. The American Bank Note Company issued a series of posters in 1939, published by the Eaton paper company as part of an advertising campaign. One of the posters depicts the S1 hauling the Broadway Limited. Service history The S1 began its passenger train services starting from December 1940, on the run between Chicago and Pittsburgh. On its first run out of Fort Wayne, Indiana, the crew