Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,470 pages of information and 233,895 images on early companies, their products and the people who designed and built them.
1926 Anglo American became the largest single shareholder in De Beers Consolidated Mines
1927 De Beers expanded its operations into both the North West and Northern Cape provinces, to exploit the Lichtenburg and Namaqualand diamond discoveries.
1929 Sir Ernest Oppenheimer became chairman of De Beers
1934 De Beers established the Diamond Trading Co to market rough diamonds in London and Kimberley.