This is a problem. Well, in fact I know very well the car, but what is behind is quite complicated.
Let's start from the beginnning. The only thing very sure is that the base today is a Fiat 509 chassis.
Then 2 stories have been spreaded around.
Tale one: the car, obviously called "pesce", "the fish" in Italian, has been made in aluminum by "Martelleria Italiana Panzeri, Riva & Lavari", quite obscure Milan-based firm, in 1926. Then the car was forgot for years and appears back in the 70s at some classic car shows (a picture on major Italian magazine "Quatroruote" figures it).
Tale two: the aluminum body was made by somebody unknown in the late 20s for a Fascist party officier; than (this's history) the Fascit regime asked citizen to support the Empire's conquest donating iron to make weapons. Gates as well as old cars has been scrapped to the foundries. The zealous owner of this car was among the first ones to contributes to the national cause donating his old auto; the more than zealous soldiers getting it recognized the aluminum body and, as Mussolini wanted iron, accurately dismounted the body and gave it back to the owner. It waited unseen a few decades hidden somewhere until a well know collector bought it and, in the 90's, finally heared somewhere the true story, get a naked Fiat 509 chassis, made a heavy restoration of the body and coupled them re-making the original car. It was presented in this way in "Ruoteclassiche" magazine.
Which story is the true one?
The main problem is that both have been told by the same person...
My personal opinion is that the car is a modern (70's) false at all and he is just looking for some awareness to better sell it to some japanese people... Of course forgotting that old picture on a 70's issue of Quattroruote showing him driving it when now he is telling it should have been dust-covered somewhere as a detached body...