looking up some old vw-magazine's this is what I found

vw-wob aug-2004
built by a german guy called Patrick Koller Who apparenly got the car from a couple he was friens with. in this article they are saying it's a may 75 car but,
I remember seeing photo's on the inet (years and years ago)of metalic blue 83 car with the rear cut out. and being turned into this car!!

then the car was sold to a guy in england called Rajan who later sold it to Jay McToldrige
(who I believe still owns it)

PerformanceVW june/08

Jay did a rebuilt on the car, and in the article it is told that the car isn´t a 75.

This car has been to mivw show in 08