Lionel 6-31960 O Gauge The Polar Express Train Set w/ Diorama NIB. COMES WITH DIORAMA NEW IN PACKAGE. SEE PHOTOS FOR ITEM AND CONDITION. GREAT FOR THE LIONEL OR MTH O GAUGE TRAIN COLLECTION. ITEM DESCRIPTION: I do my best to accurately describe and picture each item. The pictures are part of the item description, so please view them… Thank you for doing business with.