Person ^? J.-R. Leisk

• From 1923-01-01 to 1927-12-31, Administrateur of THE NATIONAL BANK OF SOUTH AFRICA LTED (Banque Nationale de l'Afrique du Sud)
• From 1940-01-01 to 1940-12-31, Président of MODDERFONTEIN B. GOLD MINES LTD
• From 1945-01-01 to 1945-12-31, Administrateur of MODDERFONTEIN B. GOLD MINES LTD