The State Railway of Thailand ASR class is a diesel multiple unit operated by the State Railway of Thailand (SRT). Built by British Rail Engineering Limited at Derby Litchurch Lane Works in England, it is based on the British Rail Class 158. Twenty carriages were built in 1990/91.Thai Express The Railway Magazine issue 1082 June 1991 page 383 All were painted in the same Regional Railways livery as the Class 158s.State Railway of Thailand 158s Modern Locomotives Illustrated issue 190 August 2011 pages 78-80 The livery was changed to a livery designed by SRT in 2011.More than just a Sprinter Today's Railways UK issue 148 April 2014 References
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