It's a Monoposto Tipo B (aka P3), a GP car that ruled from 1932 to 1934. Initially entered by the Factory in 1932, it was campaigned by the Scuderia Ferrari from 1933 on.
The specific example is a late one, fitted with Dubonnet independent front suspension, a modification made in 1935. In such a car, Nuvolari won the 1935 German GP. I'm sure I have the chassis number in my archive, but not at hand here.
Since it's an absolute classic racing car, I recommend you search the BB for related posts/thread. For more comprehensive discussions about some features of the car, I can recommend this and this thread from the Atlas F1 Nostalgia forum.