Oscar Blankenstein Born 16-5-1874 Hagen, Germany, died 27-10-1936 Amsterdam, Netherland, 61 or 62 years Married to: Hermine Mien Sanders - de Groot Born 16-5-1874 Caub, Germany, died 24-1-1967 The Hague, Netherland, 92 or 93 years. Daughter of Herman Sanders - de Groot and Frederika de Groot - Fuldauer |