English: Poster for the 1939 film Blue Montana Skies.
The item has no copyright markings on it as can be seen in the links above. At bottom left is Country of origin USA; at bottom right is 16021. The logos at lower left are of Republic Pictures and the Morgan Litho Corp, Cleveland, O, who printed the poster.
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.