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Mallard is a famous streamlined A4 who set the speed record for steam locomotives in 1938. Spencer is his brother, along with Gordon and The Flying Scotsman being his cousins.


When undergoing a trial run in July of 1938, Mallard achieved the top speed record for steam locomotives at a speed 126 mph, a record which still stands today.

When Thomas visited the National Railway Museum in 1990, Mallard was one of the engines present during his visit.




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