For sale is an MTH RailKing O Gauge Rock Island Alco RS-3 Diesel Locomotive, item number 30-2202-0. This highly detailed 3-rail engine features a beautifully finished ABS plastic body in the striking black, white, and red Rock Island livery. It is equipped with MTH's reliable Loco-Sound system featuring digital speed control, bell, horn, and realistic diesel engine sounds. Comes original in box.