This is 1 of only 2 ever made, the other is in a museum in the Isle of Man.
I cannot tell you much appart from it is 200cc 2 stroke with 4 X NSU barrels and home made crank cases linked with 1 crank, its built on an MV Agusta cs 175 frame ..
It was built by a bloke called 'Bert Fruin' and i believe 1961 vintage.
If anyone is interested in it please drop me a mail and i'll pass on Mark's details so you can find out more.
Here's a couple of pics to view.

Offers around £6000.
(this is 1 of only 2 ever made)
Swirling around in the cesspit of day 2 day life....