This is a car built by the Eisenach Motoren Werke (EMW) in 1954. I have not been able to find any other model designation than "World Record Breaker", although it's not very likely that the East Germans would name their prestige project in English... so, the name may have been "Weltrekordwagen", or, as it is called in a German site, simply 1,5-Liter-EMW-Rennsportwagen (racing car). It was piloted by Arthur Rosenhammer in a successful attempt to break the speed record for cars without a supercharger, at the Autobahn. Rosenhammer achieved an average of 229.5 kph over two runs of 10 miles.