Here is a Lionel 6-18107 O Gauge Denver & Rio Grande PA-1 A-B-A Diesel Engine Set #6001 and #6002 from 1992. This set features Railsounds, die-cast metal and stamped metal frames, a constant voltage lighting system, operating mars light, opening cab doors, engineer figure, die-cast metal trucks, knuckle couplers, and metal wheels and axles. This set can run on both AC or DC power supply.

Please see my pictures for additional features.

Brand new, only opened to take pictures as shown in this listing.