I don't believe Hudson offered Weathermaster until 1941, or perhaps 1940. You might be able to set it up on a 39 anyway.

The weather master was introduced in 1939 so I was told. It is shown in one of my dealership brochures saying that the dealer can install. But I would guess one from a 40 or 41 may be the same?

Victor,
I see that, and didn't know that. I posted something about it on the other forum. Good luck finding what you want for your car! Looks like a beauty! Where are you located? I know of 2 1939 sedans in my area (large area).

Victor,
No, not the same. I have 3 1941 Hudsons, and they are very must like the stepdown arrangement. Not exactly the same, but pretty close. 1940 was a one year only event. It's pictured in the sales brochure. P. 28. on this link.

http://hudsonterraplane.com/tech/1940/1940HudsonSalesBrochure.pdf

Thanks you it is a nice car. St Louis .