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.
Old Poster: http://www.latinamericanstudies.org/pr-immigrants-statistics.htm {{PD-old}}
Captions
Advertisement poster for a professional baseball game between the San Juan BBC and Porto Rico Stars at Howard Park in Brooklyn, New York, circa July 20, 1924.