Bachmann 18403 HO Scale Bobber Caboose Durango & Silverton An Old-Time Bobber Caboose is any short four-wheel caboose that ran on a number of railroads in the late 1800s and early 1900s. Bachmann Old-Time Bobber Cabooses are the perfect addition to your old-time railroad layout and come in a variety of colors and road names. FEATURES: Silver Series® Rolling Stock – Fully Assembled Highly Detailed Painted Bodies with Precision Graphics (where applicable) Blackened Machined Metal Wheels with RP25 Contours Magnetically Operated E-Z Mate® Couplers Non-magnetic Blackened Brass Axles with Needle-point Bearings Celcon® Trucks Added Weight for Optimum Tracking Performance HO Scale 1:87