Ausweis card to a German worker of the IG Farbenindustrie in Frankfurt - 1938. Laminated card with photo of the owner. Excellent condition with ink stamp of IG Farbenindustrie Frankfurt. IG Farben was a gigantic conglomerate of chemical industries that reached their peak of production and development during the III Reich. IG Farben had close bonds with slave labor and concentration camps such as KL Auschwitz, where the enormous chemical complex Monowitz was located and known as Auschwitz III.