storage bins to support a self-sustaining/self-reliant car whether on the road or on a siding while making track orders. This variety of features is easy to spot with a variety of window placement and sizes, while observation car windows tend to be more uniform in size and placement.

Among North American railroads, their observation cars often featured any of a variety of upcharge revenue seating, reserved sitting/drawing rooms or sleeper roomettes in the forward section, in the form of reclining coach seats, plush parlor car