STREAMLINED CABOOSE WITH OFFSET CUPOLA - BURLINGTON NORTHERN #10420 - HO Scale. The original design of the Streamlined (sometimes called Offset) Caboose was built by the Wabash Railroad in the early 1950’s. The most common form was a small windowed projection on the roof, called the cupola. The crew sat in elevated seats to inspect the train from this perch while the train was moving. The caboose also provided the train crew with a shelter at the rear of the train. The crew could exit the train for switching or to protect the rear of the train when stopped. Bachmann Streamlined 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, 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.