Person ? H.-O. Zwicky
- From 1953-01-01 to 1953-12-31, Administrateur of N. V. SIBOGA CAOUTCHOUC PLANTAGE (Plantation de caoutchouc de Siboga)
- From 1953-01-01 to 1953-12-31, Administrateur of PLANTATIONS DE CAOUTCHOUC DE TAPANOELIE
- From 1953-01-01 to 1953-12-31, Administrateur of PLANTATIONS DE CAOUTCHOUC DE SUMATRA