"The Enzmann family designed and built the Enzmann 506 bodies in Switzerland , then bought Volkswagen Beetles directly from the VW Factory and had the car shipped to thier shop back in Switzerland. The bodies were removed and the Enzmann bodies were then installed. You could get the car in many different performance packages, the best was with the 356 Porsche Engine and 356 brakes. With this set up, the Enzmann's used to give the Porsche 356's and 550 spiders fits back in the day....they had the same drivetrains , but due to their weight, they used to leave the Porsche 356 and 550 spiders in the dust in road racing on the European race circuits . The Porsche 356's weighed 1700 plus lbs and the Porsche 550 Spyder's came in around 1346 lbs. The completed Enzmann weighs only 1102 lbs. The dimensions are very slightly over 156 inches long, 48 inches wide, and 36 inches high."
There is a Swiss website dedicated to the cars (written in German). You can find it here.
The seller says that 67 of these cars were built, but just 19 are known to exist today. This car was "recently discovered" in Southern California. It is complete except for the engine.
Located in Huntington Beach, CA, click here to see the eBay listing.
It looks like Enzmann also built a few cars based on DKWs. It's a really nice looking car. You can see some pictures of it here.