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In page Silver Star Cafe (Port Hedland):

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The General Pershing Zephyr was the ninth and last in a series of "shovelnose" Zephyr streamliners operated by the Burlington, and the only one made up of non-articulated cars. The "shovelnose" Zephyrs were lighter and faster than their contemporaries, because they were made of lightweight stainless steel, to a unique "streamlined" design.[2] Although the earlier, articulated, versions of these trains had the further advantage of a reduced number of trucks (bogies),[3] and no couplers,[4] the General Pershing Zephyr's non-articulated configuration provided maximum flexibility and ease of maintenance.[5]