A collection of rarely seen photographs of the Leys Malleable Castings Company are to go on display.
The photos date back to the 1920s and show the working practices of one of the UK's most significant industrial companies during the late 19th and 20th centuries.
The company opened in 1874 in Derby and manufactured castings for motor cars. It closed in 1987.
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Heavy, showery rain overnight, perhaps thundery. Becoming drier for Friday.
Police have released the images as part of an investigation into an alleged arson at a farm.