The Post Office, Supermarket and Chain (5&10) Store and Drug Store have changed very little over the years. The all share the same color back and sides, which ironically are a different color from the fronts!!!
The roofs matched the window and door trim, so if you have a red roof with gray doors, then somebody switched some of the parts. The only known variation is that some of the gray roofs were more of a silverish color. The silver color is much more rare than the standard gray, which again, was common to a number of items.
