Zooming in, it looks like it could say "B & O Station." Which is good because the B&O did run through Braddock, PA.
(BTW, the two-letter state abbreviation came into official use on 1965 but they were in common use for ages.)
Other than the masonry parapet walls, there really is little about the structure that suggests the southwest, in my opinion. These types of walls are often found in the northeast, usually in adjoining structures where they act as firewalls.
The first link to the kit at Walthers could be a good starting point, though it looks much too long. Discard the end sections of the kit. In the remaining part, cut slices along the middle section with the reverse gable & scratchbuild the masonry walls out of a thick piece of wood perhaps. Cut the half-round window in the front and hip the end roofs & you'll have the feel of that in the photo.
Wayne