The car is called "WTD/HVB/X" and was a "promisign design" for a car to race at (amongst others) Le Mans. It's chassis was build at Han van der Blij, which maked up the HVB part of the name, design took place at Wolf Total Design (WTD) and the body was made out of plastic from the "Polyesterindustrie Lory BV". The car was to be powered by a NSU Wankel engine (mid-engined). The chassis and engine have gone - according to my information, but the body and the mold supposedly have been sold in the early nineties to a enthusiast.
The name is not made up; it is visible on the side.