I suppose it is time to accept the idea this is not a Fiat, even if that rubber covering we can see inside is actually topical of '50s fiats. Plate site is clearly Italian. Rear lights look like Alfa Romeo ones, but I don't remember any 1900 wagon (apart from those built by Frua and Monterosa that are different), and wheels are too narrow for a 2500. Lancia RHD? I don't think so. It's driving me mad!
Is it Alfa Romeo based?