Tatra is the 3rd Oldest Car Manufacturer

The Tatra 600, named the Tatraplan, was a rear-engined large family car (D-segment in Europe) produced from 1948 to 1952 by the Czech manufacturer Tatra. The prototype was finished in 1946. After World War II, Tatra continued its pre-war business of building passenger cars and commercial and military vehicles. The factory was nationalised in 1946 two years before the Communist takeover. Although production of pre-war models continued, a new model, the Tatra 600 Tatraplan was designed in 1946-47 by Josef Chalupa, Vladimir Popelar, Frantisek Kardaus, and Hans Ledwinka. The name of the car celebrated the new Communist planned economy but also referred to aeroplane inspiration.
Originally, the 600 was known as the Tatra 107, continuing from Tatra's previous aerodynamic cars - the 77, 87, and 97 - as it was intended as a newer, smaller, and cheaper version to replace the outdated Tatra 57. Tatra switched to a new numbering system after WWII, with all car model codes beginning with 600; as a result, the Tatra 107 became the 600.