Person ? F. Hirschhorn
- From 1912-01-01 to 1912-12-31, Administrateur of DE BEERS CONSOLIDATED MINES
- From 1912-01-01 to 1927-12-31, Administrateur of NEW JAGERSFONTEIN MINING AND EXPLORATION COMPANY
- From 1917-01-01 to 1917-12-31, agent administratif of DE BEERS CONSOLIDATED MINES
- From 1923-01-01 to 1923-12-31, Administrateur of DE BEERS CONSOLIDATED MINES
- From 1927-01-01 to 1927-12-31, Administrateur of DE BEERS CONSOLIDATED MINES
- From 1927-01-01 to 1927-12-31, Administrateur of PREMIER (TRANSVAAL) DIAMOND MINING COMPANY LTd
- From 1933-01-01 to 1933-12-31, Administrateur of DE BEERS CONSOLIDATED MINES