The 601 in particular - the third and most built model in the Trabant series has long since been elevated to cult status. Mass production of a three-door estate car version of the 601 designated the Universal was launched in 1965. This vehicle also had body panels made of Duroplast developed in the body shop in Merane. For reasons of cost the easy to maintain Universal was also technically identical to the saloon. Over 500,000 units were built. It was also powered by an air-cooled two-cylinder two-stroke engine displacing 600 cc and producing the distinctive two-stroke sound.