Photo# 5 confirms my guess.
I have a book with a side on photo and the profile fitted pretty well.
The first F.N.305 flew on the 19th February 1935 and was piloted by a chap named Arturo Ferratelli. It was powered by a Fiat A.70S radial engine.
To meet orders, Nardi licensed Piaggio who built 258 305A's with Alfa-Romeo 115 powerplant.
Even IAR built 124 305's powered by the license built 6G-1 engine (DH Gipsy Six)
There was also a long range version (305D) that had a Walter Bora radial that made a record breaking flight (in its class) from Rome Addis Ababa, Ethiopia.
Heres the next challenge:
Good Luck!