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Makers of contact lenses and lathes for machining contact lenses.
1946 George Nissel went into partnership with George Grimes, who had previously serviced the machines that Nissel used during his work, and started production of lathes for machining contact lenses. Their premises were in Siddons Lane, London. 
2000 Nissel Ltd was acquired by David Cantor, and is now named Cantor and Nissel Ltd, based in Brackley, Northants. Cantor & Nissel website.