Having trouble with uploading any "evidence" but another search actually describes it as an Alfa Romeo 1900L Boneschi/Riva. So I guess that is the other carrozzeria You ask for ?
That's right, Carrozzeria Riva is the name I was looking for, so that's another point for you.
I got the following PM from Hiawatha which explains the involvement of both Boneschi and Riva.
Thanks for that Luciano but no points I'm afraid!
QUOTE
The car in the puzzle started life as an advertising vehicle for Ignis appliances and the body was by Boneschi.
It was later modified to the current layout by Carrozzeria Riva. I would then say more Riva than Boneschi.
Regards,
Luciano
UNQUOTE