I am wondering if all 1937 convertibles were assemebled at one plant due to their limited production. In the later years all convertible bodies were made in Lansing an and shipped to the various assembly plants. If the 1937 convertibles were made at one plant I would guess it would have been at Flint due to being located near Lansing.
GM historian David Hayward, via another forum, suggests that my 37 right hand drive (RHD) Fisher bodied cabriolet originated out of Tarrytown? NY. Besides being RHD, it has the same parking lights on the fenders shown above. I have only seen those style lights on export models. My belief is my car, shipped in from New Zealand, came from Argentina, and was problably a crate-knock-down from the New York plant.
I have seen the video clip mentioned above a while back, but failed to notice what side the driver was on or if it had parking lights, but I did note the side mounts, or welled fenders, as I too have them as Gene mentioned above.