Well, I did a long research but I didn't find so an ugly 1100.
The rear angular glasses are very similar to the ones Monterosa used in its wagons; but as I know very well 1100 EL Monterosa (having one, or perhaps the only remained), I'm sure the front is very different. So it is not.
Also Viotti used lateral glasses in the back, but they where not angular; anyway his wagons were woody, and this doesn't look to be.
Quiz car looks different from all the 1100 well known wagons by Francis Lombardi, Fissore, Boneschi.
I try with Coriasco, on Fiat 1100 EL 1950.