Was this car showed al Salone Auto e moto d'epoca Fiera Padova?
Now the answer to your question is "yes"!
I've found what I think might be the same car; a one-off Barchetta built in Italy around 1953-54 and based on a DKW 3=6 1000. I'm struggling with the builder's name though. Could it possibly be Carlotto?
Wow...not Carlotto but your guess can't be a coincidence.
The car was at Padova and the people there were not aware of its builder before I met them
I spoke with its builder and collect few info. He built 2 cars and your name is closely related the the other car he built.
Locked for you.