Caerphilly Castle' at Swindon Works, 1 April 1925. Great Western Railway (GWR) Castle Clas 4- 6-0 steam locomotive No 4073. Designed by C B Collett, the Castles were based on the GWR's Star Clas locomotives, and were built in several batches between 1923 and 1950. The locomotive has been painted in 'works grey' so that detail would register on the glas plate. GWR official photograph.
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