BMW
After the end of World War I in 1918, BMW was forced to cease aircraft engine production by the terms of the Versailles Armistice Treaty. To remain in business, BMW produced farm equipment, household items and railway brakes. In 1922, former major shareholder Camillo Castiglioni purchased the rights to the name BMW, which led to the company descended from Rapp Motorenwerke being renamed Süddeutsche Bremse AG (known today as Knorr-Bremse). Castiglioni was also an investor in another aircraft company, called "Bayerische Flugzeugwerke", which he renamed BMW.The disused factory of Bayerische Flugzeugwerke was re-opened to produce engines for buses, trucks, farm equipment and pumps, under the brand name BMW. BMW's corporate history considers the founding date of Bayerische Flugzeugwerke (7 March 1916) to be the birth of the company.
BMW 326
In 1945, Eisenach was occupied by US forces. However, the wartime allies had already agreed that Thuringia would fall within the Soviet occupation zone. The plant that BMW had originally acquired in 1929 was not fully destroyed, and it was possible for returning survivors to assemble sixteen postwar 326s. A modernised version, badged initially as the BMW 340, emerged around 1948. Despite the nomenclature, it was clear that BMW’s Eisenach plant was no longer under the control of BMW: later BMW 340s, still based on the prewar 326, were badged as EMW 340s following a protracted dispute concerning title to the BMW name. It was, perhaps, a tribute to the 326's perceived excellence, together with the skills of the workers who had struggled to revive it, that the Eisenach plant was permitted to produce the BMW design till approximately 1955, long after the Auto Union assembly facilities at nearby Zwickau had been dismantled and removed to Russia as part of the war reparations package.