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Gwr Iron Duke ClassThe Great Western Railway Iron Duke Class 4-2-2 broad gauge steam locomotives for express passenger train work. The prototype locomotive, Great Western, was built as a 2-2-2 locomotive in April 1846, but soon converted to 4-2-2 arrangement. The remainder of the class entered service between April 1847 and July 1855. In May to July 1870, three locomotives (Great Britain, Prometheus and Estaffete) were rebuilt to a new design, retaining their original names. Following these, further locomotives were built to the new design, entering service between August 1871 and July 1888. Although these locomotives took the names of withdrawn locomotives of the original design, they were not rebuilt from them like the first three, but entirely new locomotives (though it is believed that Rover, Swallow and Balaklava may have included some parts from the earlier locomotives of those names). Apart from the three conversions, the original locomotives were withdrawn between December 1870 and June 1884. Lord of the Isles (the last to be withdrawn) was initially preserved by the GWR at Swindon Works, but was scrapped in January 1906 owing to pressure of space. The three conversions were withdrawn between September 1880 and October 1887, while the other locomotives to the later design were all withdrawn with the end of the GWR broad gauge in May 1892 (except Hirondelle, which had been withdrawn in December 1890). List of Locomotives The list is in chronological order according to the date each locomotive entered service. Notes: a The first GWR broad gauge locomotive to carry this name. b: The second GWR broad gauge locomotive to carry this name. Original Design Second Design
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