Bay Window Caboose with Roof Walk NORFOLK WESTERN #557592 - HO Scale. In a bay window caboose, the crew monitoring the train sits in the middle of the car in a section of wall that projects from the side of the caboose. This caboose design allowed for a better view of the side of the train and eliminated the falling hazard of the cupola. The bay window gained favor with many railroads because it eliminated the need for additional clearances in tunnels and overpasses. Bachmann Bay Window Cabooses come in a variety of colors and road names. Each caboose is fully assembled and features include; Highly Detailed Painted Bodies with Precision Graphics (where applicable), Blackened Machined Metal Wheels with RP 25 Contours, Magnetically Operated E-Z Mate Couplers, Non-magnetic Blackened Brass Axles with Needle-point Bearings, Celcon Trucks, and Added Weight for Optimum Tracking Performance.