Whatsit ? I don't know !
From the 1961 movie "Appuntamento a Ischia"
I believe it's a 1950 Fiat 1400 Cabriolet by Vignale...
Doubtless it, and the car still exists !
Time to call this one solved?
This car also featured in the 1955 movie "Il bidone":
Well ! 1 point for João