From the internet

authorizing work like a designer
German issued card for Dr. Ferdinand Porsche issued during period 1933 – 1936 by the German State Sanctioned Auto Regulatory Body – NSKK which became the ADAC after WWII. This document legally allowed Dr. Porsche to work as an automobile designer, engineer and car constructor. Without it Dr. Porsche could not have worked in Germany at that time, therefore there would have been no VW, no Porsche 356 or 911 et al that followed”