Sir Bernard Oppenheimer, 1st Baronet (13 February 1866–13 June 1921) was a South African-British diamond merchant and philanthropist. Oppenheimer was chairman of Pniel\s Ltd, the New Vaal River Diamond Exploration Company, and Blaauwbosch Diamonds Ltd, and managing director of Lewis Marks Ltd of Holborn. His brother, Sir Ernest Oppenheimer, was also heavily involved in the diamond industry. In July 1917, Oppenheimer established a scheme for training disabled soldiers in diamond cutting at Brighton, England. The Bernard Oppenheimer Diamond Works (National Diamond Factories Ltd) opened on Lewes Road on 1 April 1918. It was mainly paid for by Oppenheimer himself and by Lewis Marks. In 1920 it also opened branches in Cambridge, Wrexham and Fort William. By 1921 the works employed about 2,000 men who were referred to it by the Ministry of Labour. New men received six months training,
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