Probably just like Keith I think this must Stephan Pehl's website
http://www.acaceca.de.tl/ It is interesting that the record on AEX 659 also shows the chassis plate and there is no doubt that this picture actually shows AEX 659.
The plate appears to be separated from the car in this picture though.
However, the other pictures show an early Aceca with the pointed lower windscreen corners. By this chassis number AC had already changed to the rounded corners.
I think you are right with your assumption Keith. There are some more similaraties between "them", not only the exterior colour but also the red interior colour, the radio beneath the glove box, the overriders without bumpers and the driver's side door mirror.
The pictures on "659" have been taken at VSOC in Holland and 569 has been in Holland under the registration number AE-52-45.
So all in all, quite likely it is indeed AEX 569.
So where does this authentic chassis plate picture come from?
Jerry