The Harburg Phoenix is one of the oldest companies in Harburg. The founders, the brothers Albert and Louis Cohen, sons of a Jewish banking family, received the civil rights from the Harburg mayor August Grumbler on June 13, 1856. They had been commissioned by the city to operate a factory for the production of rubber shoes and vulcanized rubber. The factory changed its name several times. In 1872, it merged with an Austrian company and was now called Vereinigte Gummiwaren-Fabriken Harburg – Wien". In 1922, the company collapsed again with the onset of inflation.

In addition to Ida Gottschalk, née Leeser, two Stumbling Stones have also been laid in front of the house at Alte Dorfstraße 13 in memory of her daughters Herta Hirsch and Rosa Israel.

On January 23, 1901, Irma Jasser was born in Rosbach as the daughter of Jacob Leeser and Hermine Hecht. Her parents ran the first Jewish textile business in Rosbach. Irma learned the trade of hatmaker and milliner in Cologne, probably in the branch of Benno and Sybilla Leeser's ladies' hat business in Dusseldorf. In 1925 she married the Jewish merchant Hugo Kaminka, who worked briefly in Cologne. In 1926 she gave her life to Wolfgang in Gießen, but after 7 years of marriage she divorced him, took her maiden name and moved back to her parents in Rosbach.