I am aware this is probably not an ideally-suited SE section for this question, but since Cars seems to have been discontinued I am guessing here is where most car-savvy users will be found.
The problem is to identify the vehicle in the photo. Context is a small South European town, Andorra. Other vehicles in the image (not reproduced here) are not identifiable, with the exception of a GMC CCKW truck, probably from US Army origin and sold as surplus for civilian use after 1945. From the buildings seen, we can also safely assume the image has been taken before 1960 or thereabouts.
From the absence of headlights, I would think this is probably the rear part of the vehicle, though in that case the rear window has quite a peculiar shape. The shape of the bumper stops makes me think of a US make, though this is not definite since some European brands followed american styles. Any help would be greatly appreciated.
Here is the full image for context:
Image taken from this website and is used for illustration purposes only.