After much internet research I can find no other name associated with this car. The only thing I can add to my previous answer is that the chassis is a Siata 208S, for which several big name coachbuilders produced both closed, and open, bodies. Vignale produced three, but I can not find a particular name (like that associated with some other Siata models) associated with any of them.
The last reply seems to indicate that the correct answer does not appear on the internet, but lies elsewhere. If this is true, then I have no chance of locating correct answer, as virtually 100% of my resources are located on the internet.