I forgot this one!
Here's what it's in my books:
The B. Junior was the name given to the 1st creation of Gian Paolo Boano, Mario Felice's son.
It was presented at the Turin Motor Show in the spring of 1952, on a Fiat 1900 chassis, black and jade green painted.
The same model was shown at the Paris Show, the same year, with a different radiator and in a grey and amaranth red painted body.
The following year at the Turin Motor Show there was the B. junior 2, on a Lancia Aurelia chassis.
The Lancia should be the one with the vertical elements on the grille, the Fiat should have 2 series of 4 chromed round elements.