Karl Deffner

He was the son of manufacturer and politician, Carl Christian Ulrich Deffner (1789–1846).

In the 1850s he gradually handed over the company's business to his younger brother, Wilhelm Deffner (1829–1897).

[1] He is known for his geological investigations of Württemberg, in particular, exploratory studies of the Nördlinger Ries crater and the Filder Graben (located near Filderstadt).

Shortly before his death, he donated his paleontological, mineralogical and geological collections to the Oberrealschule in Esslingen.

[2][3] Between 1855 & 1870 he was a member of the Württemberg Landtag (Liberal Party), and between 1868 & 1870 was part of the Zollparlament.