Great Western Railway 3700 Class 4-4-0 'City of Truro'.
 The GWR 3700 (or 'City') Class locomotives were a series
of twenty 4-4-0 steam locomotives designed for hauling
express passenger trains.  The most famous locomotive
in the class, 3440 'City of Truro' (later renumbered 3717),
is reputedly the first steam locomotive to travel in excess
of 100mph, on 9 May 1904.  It was the 2000th locomotive
to be built at Swindon, leaving the works in April 1903.

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