My family came across this photo of my grandfather at the wheel of this car, which looks to be bearing a Rolls Royce spirit of ecstasy radiator cap. The photo would be from the late 1930s, but the car looks to be a decade or so older. Pop-pop and great grandpa were both sort of celebrities in Australia at the time (Pop-pop was a pro wrestler and his father was a well-known opera singer), but I don't think either of them had it like that.

Can anyone confirm the make and ID the model and year? Many thanks in advance.