Sorry, I suppose this Urania is not from 1947 but from 1948. In that year, infacti, Bernardo Taraschi realized this little bomb (80 Hp) resizing the 750 Bmw engine he used the previous year and supercharging it with a Roots compressor.
I don't know if this car still exist, but probably its chassis has been used to realize another barchetta, with bmw 750, and without compressor, in 1949.