Ludwig Baldass studied art history at the universities of Graz, Halle, Munich and Vienna and was awarded a doctorate from the University of Vienna in 1911.

Karl Baranyi, who came from Bohemia, first registered his domicile in 1919 in Vienna, where he worked as an auctioneer at Neubaugasse 68 in the 7th district until he lost the concession in 1932 after being sentenced to i

Leopold Detoni was an amateur photographer, photojournalist and from 1922 at the latest owner of Fotofachverlag Josef Detoni in Vienna.

Mathilde Pfannl was employed from 1929 to 1939 by the Kleinkaufmannschaft Wien fund and from April 1939 in the commerce department of the Wirtschaftskammer Wien (Vienna Economic Chamber).

Before becoming involved in the art market, Ferdinand Spany worked as a transportation clerk for the E. Bäuml company.

After completing secondary school in Vienna's 6th district, Friedrich Trauth studied Greek and Latin and then geology and palaeontology, took further natural science courses and obtained his doctorate in 1908 sub auspiciis imperatoris.