I first saw this quite a few years ago, however when I did finally track it down again, it hasn't really helped! It was parked in the Haag for several years and lots of people have taken photos of it whilst it's been slowly decaying, asking online what it is. It's clearly based on a converted Brommobiel of some kind, and I did find some unconfirmed speculation that it had a body handmade by students from the nearby Haagsce Hogeschool. Several pages have listed it as a Canta GT or Canta Turbo, which given the Canta brand has been around in this field since the 1990s is quite likely to have been the car that formed a starting point for this vehicle although I expect the additional nomenclature is pure speculation. From a video online, it has lettering on the back that says SJM 50/70 - which has so far defied any further identification, it has several Polini tuning stickers and it once had a brass plate on the front bumper that said SUPERBROMMERT.