Since I don't think I was able to view all pages of the brochure, a copyright renewal search was done under periodicals for "Baltimore and Ohio" and "National Limited" for the years 1965 and 1966. No information was found. While I believe the item was never copyrighted, I'm licensing this as copyright not renewed to be sure of a correct license.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
{{Information |Description=A bedroom compartment of the National Limited. Real beds were provided in rooms. |Source=[http://www.ebay.com/itm/Baltimore-Ohio-The-National-Limited-1938-Name-Train-Brochure-/131019004060?pt=LH_DefaultDomain_0&hash=item1e81...