This is a Lionel F-3 Diesel engine Powered A unit (with two motors) and non-powered B unit decorated for the Northern Pacific Railroad. It was illustrated in a 1997 catalogue along with four vista-dome passenger cars. This set is very nearly new. Since they have rested in their boxes for over 25 years they should be oiled if you intend to operate them. I removed them from their boxes for photos and to verify that the power unit properly sequences forward/neutral and reverse and that the light works. A small plastic engineer figure is included in the box. The non-powered unit contains a digital sound system and horn, both of which operate correctly. The boxes show a few signs of wear and include styrofoam inners. I have been unable to locate the original instruction booklet and have photo copied one from another diesel set. Lionel chose a different paint scheme from that used on the passenger cars. Later that year Lionel released a second diesel set with a paint scheme to match the passenger cars. I have listed for sale the set of four passenger cars as well as the later F-3 diesel engines. 
  
I recently completed a layout. The layout does not accommodate all the items I've collected for over 40 years. I will be listing postwar and modern train items over the next few months. Conditions vary from New in the box to Used. I am a long time member of TCA and LCCA train clubs and am new to the sell side of eBay. My goal is to have satisfied buyers so write to me with any problems or questions you may have.

The A B set will be shipped in the box that was used by Lionel to ship them to the dealer. 

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