A half-length seated portrait of James Watt (1736–1819), inventor and engineer.
James Watt. From a Picture by Sir W. Beechey in the possession of J. Watt Esq. of Aslon Hall. Engraved by C. E.Wagstaff. London, Published by Charles Knight & Co., Ludgate Street
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Nylon valve, 1940s–1950s
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