Siegfried Hamburger was the seventh child of the cattle dealer Gabriel Hamburger and his wife Nanni, née Neustätter. Siegfried Hamburger was born on July 10, 1900 in Nördlingen. He died on September 10, 1986 in Miami in the USA.

Text of the picture postcard: Dear Siegfried ! 19.7.19.  Why do you let hear nothing. Do you know something when we come to Augsburg. Let it go you well in the vacations like me. Just come home from a bike ride. Almost every day it goes away. Now be greeted by your August.

In the address book of Fürth from 1859, the following entry can be found: First main district - Rosenstraße 261q - Morgenthau Moritz, Manufakturwaren und Spiegelglas en gros Handlung.

In the address book of the city of Augsburg from the year 1926 the following entries can be found: Page 182  - Horkheimer Hch., sugar confectionery wholesaler,( Inh. d. Fa.: Heinr. Horkheimer ), Volkhartstr. 6/1.  -  Heinrich Horkheimer,*  Fa. (Inh.:Heinrich Horkheimer, sugar confectionery wholesaler, Mittlere Maximilianstr. B 14.; - Part IV: Page  134  - Sugar confectionery.   - a.) Wholesalers - Horkheimer H., Mittlere Maximilianstr. B 14. 

In the city address book of the city of Coburg from 1937, the following entry can be found: Kahn, Sally, merchant, Darmhandlung, Mohrenstraße 7b.

In the Regensburg address book 1903 the following entry is found: Jonas Hahn, scrap iron and broken metal en gros und en detail, Weißgerbergraben 7.

The Niedermayer brothers were owners of a private bank in Regensburg. Listed in the 1903 Regensburg address book as Bankgeschäft Josef und Leopold Niedermayer, Ludwigstraße 8.

Entry in the address book Regensburg 1903 - banking business Dr. Hugo Thalmessinger and August Strauß, cheerful Türkenstraße 1

1904 - Conversion after marriage to the Catholic Viennese actress Catharina Schwarz