I was hoping to keep this one until I become a pro...
OK then, I won't consider your reply until then.
![:applause:](https://www.autopuzzles.com/forum/Smileys/default/applause.gif)
Finally!
That's the car, built by Officina Costruzioni Balestra (Giuseppe -Beppino- and Luigi) from Bassano del Grappa.
They took a Fiat 1100 chassis, put a Volkswagen engine and matched it with a BMW gear.
I think I know where you find THAT name.
This car was advertised for sale in 1956 (?) by Nino Balestra (that was the well known name) that was a cousin of the builders.
Another view of the same car is in the "La sport e i suoi artigiani" book, on pag.80.