Rare set of 6 bentwood chairs, J&J Kohn, end 19th century

What a beautiful set this is! Six pieces available in total. The chairs have a wonderful design, especially the back rest with its organic, round forms. Hard to find model, especially a compete set. The chairs are manufactured by Jacob & Josef Kohn, Vienna, Austria, around 1880.
The set is a great condition considering its age and the fact they are unrestored,  they do have signs of usage of course. Please look at all images for a good impression.

About:

Jacob & Josef Kohn, also known as J. & J. Kohn, was an Austrian furniture maker and interior designer in Vienna.

Jacob Kohn (1791–1866) together with his son Josef Kohn (1814–1884) founded the enterprise in 1849. Kohn would later rise to become one of the leading furniture makers in Austria-Hungary, becoming one of the leading competitors of Gebrüder Thonet. Kohn worked together with artists of the Wiener Werkstätte and Josef Hoffmann in the design of many pieces.

Kohn merged with Mundus in 1914, which in turn merged with Gebrüder Thonet in 1921 to become the world’s largest furniture manufacturer.