This limited-production model is based on the Up #4006, which ran more service miles than other Big Boy by its retirement in 1961. This majestic model features an all-new diecast boiler, wireless tether, frame and tender, command-equipped, high-torque Pittman(r) motor, articulated RailSounds(tm) with TowerCom(tm), CrewTalk(tm) and DynaChuff(tm), 16 powered driver wheels, fan-driven smoke unit, traction tires, operating headlight, directional lighting, two figures (engineer and fireman) and a red firebox glow. Approximate length: 32".