A very nice find. Now we know the Alfa Romeo model it was based on: the 1900.
My Italian isn't good at all, but I understand that Giovanni Cecchini was not the builder. I have another name anyway. Perhaps a native speaker can summarize the text.
The text contains the location where these specials were built, the Campo Felice station at Three Sisters.
The most important thing is missing though, the name of this car.