|This ABA set was produced by Lionel in 1992 in authentic GN paint scheme w/'Mountain Goat' logo on the nose of each A-Unit. Both A units FEATURE: working headlights, illuminated number boards, metal chassis and ladders, portholes, screened vents, front operating knuckle couplers, metal wheels, die cast metal trucks. Powered A unit has; pullmor motors, eight wheel drive, magnetraction, transformer controlled F/N/R. Dummy A unit has; diesel railsounds and volume control, Dummy B unit has; die cast metal trucks, metal ladders and metal wheels. In 1993, Lionel offered a companion B-Unit (6-18108) stamped #371-B on the sides thus making up a classic A-B-B-A lashup commonly seen on the North Western USA railroads.