This is a Lionel 6-8481 O Gauge Union Pacific F3 B-Unit Non-Powered Diesel Locomotive from 1984. Features include an electronic diesel horn, die-cast F3 trucks, metal chassis, portholes, metal wheels and knuckle couplers.  Includes original box and instructions.  I judge this to be in overall Exc/LN condition.  Please review all provided pictures as they are part of the description.  Combined shipping available with my other train auctions.