LIONEL O GAUGE PREWAR 636W UNION PACIFIC CITY OF DENVER. 636W STREAMLINER 637(2), 638. PLEASE SEE ALL PHOTOS AS PART OF MY DESCRIPTION. This item is in the category "Toys & Hobbies\Model Railroads & Trains\Railroads & Trains\Locomotives".The seller is "lyuda8001" and is located in this country: US. This item can be shipped worldwide.