Otto Thalmessinger saw the light of day in Ulm in 1872. His parents were the banker Nathan Thalmessinger and Jette Thalmessinger, née Steiner. Otto Thalmessinger was admitted to the bar in Stuttgart in 1899. In the same year, the above envelope already documents the existence of the law firm of Dr. Steiner, Widmaier and Thalmessinger. In the Stuttgart address book of 1900, the following entry is found in the directory of lawyers. Thalmessinger, Otto ( Dr. Steiner, Widmaier and Thalmessinger ). Königstr.

The founder of the company, Josef Oppenheimer, was born on April 5, 1818, and was married to Henriette Oppenheimer, born on December 11, 1836. The couple had three children - Adolf Oppenheimer born. Dec. 23, 1863, Siegfried Oppenheimer, b. Apr. 30, 1869,  -  Ludwig Oppenheimer, b. Jan. 21, 1872. All three brothers were merchants by profession  and part owners of the company.

In the address book of the city of Zürich from 1935 the following entries can be found: Guggenheim, Berthold (Guggenheim), merchant, Gotthardstra;e 55 - In the Archiv für Zeitgeschichte - ETH Zürich the following entry can be found: Guggenheim Berthold ( 13.2.1880 - ? ), textile merchant. -In 1926 Berthold Guggenheim founded the company Bégé AG ". The company was mainly active in the wholesale of manufactured goods (white goods, plain and colorful woven shirting fabrics, woven and printed shawl fabrics) exclusively on the Swiss market.

Josef Lammfromm was born on July 15, 1804. He was married to Fanni Lammfromm, née Ichenhaeuser and in 2nd marriage to  Peppi Lammfromm, née Sänger. From this marriage came the two sons - Jakob, born on November 21, 1858 and Israel, born on November 13, 1863. Josef Lammfromm ran a spear and iron shop in Buttenwiesen. Based on the attached postcard, it can be assumed that the business of Josef Lammfromm continued under his name after his death on September 25, 1872.