There are no copyright marks on the full pages of the ad, as can be seen at the link above. The page is clearly an advertisement, so it is not a part of any magazine copyrights.
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 (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
{{Information |Description=Photo of the interior of one of Santa Fe's domed observation cars "Pleasure Dome", aboard the Super Chief. |Source=[http://books.google.com/books?id=V1YEAAAAMBAJ&pg=PA93&dq=santa+fe&hl=en&sa=X&ei=CqFST8nDNtSCsgL65vzvBQ&ved=0C...
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