The switch tower came in brown/gray or gray/brown. No additional accessories were included with the HO-72 tower, but a figure and a block signal came in the #2402 and later offerings.
You can have your signal bridge in any color you want, so long as you want black.
Like the Signal Bridge, You can have your railroad bridge in any color you want, so long as it is black.
The HO-100 Railroad Stations have a green roof over white sides. Later models had a brown roofs and gray platforms, and came with small accessories, such as luggage and a figure.
The Watchman's Shanty came in brown/gray or gray/brown, and included a crossing gate, and of course, the watchman, long before Sony's.
The Freight Station came in brown/gray or gray/brown. The early versions did not have any figures or freight, but later ones do. The early #2610 freight stations came in a #2412 box, but with a "2610-100" taped over the #2314. The may be because of a price increase from $0.79 to $1.00 and still use the old boxes.