Person ? Frederick Eckstein
- From 1908-01-01 to 1912-12-31, Administrateur of THE CENTRAL MINING AND INVESTMENT CORPORATION LTD
- From 1912-01-01 to 1912-12-31, Membre du comité Central à Londres of Rand Mines, ld
- From 1912-01-01 to 1917-12-31, Administrateur of Rand Mines, ld
- From 1917-01-01 to 1923-12-31, Membre du comité européen of EAST RAND PROPRIETARY MINES, LIMITED
- From 1927-01-01 to 1927-12-31, administrateur à Londres of CROWN MINES, LIMITED