Ferdinand Porsche founded his company Dr. Ing. h.c. F. Porsche GmbH, Konstruktionen und Beratungen für Motoren und Fahrzeugbau (Porsche) in April 1931 in Stuttgart. The company established a numeric record of projects known as the Type List. Initially, the list was maintained by Karl Rabe. The first number was Type 7, chosen so that Wanderer-Werke AG did not realize they were the company's first customer.