Photo of Union Pacific 4-4-0 wood-burning locomotive issued as a historical photo by the railroad. The railroad indicated that the engine and its crew were somewhere in Nebraska when the photo was taken.
Date
Last dating on the photo was 9 August 1973. Union Pacific appears to have issued the same photo for publication in March 1951 before that.
The photo has no copyright markings on it as can be seen in the original upload.
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This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. 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.
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