Although not a beauty, I was able to check in real the 4-seater prototyp in the factory archive. (see my post 69)
There is no documentary available in any literature except some recent magazine reports, as the car was discovered only recently.
Looks like another (the third) attempt to do a 911 four seater.
This looks like a late 1960ish built design study, built out of white plaster on a wooden structure.
No interior and w blacked-out plastic windows.
The car was in the museums/factory garage, usually accessible only by VIP's.
http://i1077.photobucket.com/albums/...pslf7fpbwt.jpg
http://i1077.photobucket.com/albums/...psge0jjzzp.jpg