Kurt was born on july 15 1933, just like his 4 years older sister, in the Bürgerhospital on Nibelungenallee in Frankfurt am Main.

One day before Kurt's birth, on July 14, 1933, all political parties were banned by law in Germany. Germany had thereby officially become a one-party state. Six months earlier, on January 30, 1933, Hitler came to power.

Frankfurt a.Main, am 21. July 1933 die Verwaltung des Bürgerhospitals in Frankfurt am Main said an, that of the Kätchen Sigmund, bornen Kaufmann, Ehefrau des Kaufmanns Ernst Sigmund, lived here at Ehemann in Worms am Rhein, Neumarkt 6, near Frankfurt am Main, Nibelungen-Allee 37-41, am having fun in July and will be born soon after tomorrow. Kind die Vornamen Kurt Albert habe. Vorgelesen, genehmigt und Der Standesbeamte in Vertretung Möbus. Die Übereinstimmung mit dem Hauptregister belaubigt. Frankfurt a.Main, 21. July 1933. Der Standesbeamte in Vertretung Möbus.