The Canadain Pacific Locomotive 391 0-4-2 ,Canadian Pacific Tender...with the red Pullman Montclair, Bogota coach and red Pullman Obsrvation car. These are the 6 inch 8 wheel cars and have the automatic couplers ! Marx only produced the six-inch, eight-wheel cars from 1936 to 1942. Automatic coupler was introduced in 1937, to meet with thier competion Lionel.  15