Postcard photo of Southern Pacific forward cab locomotive 4002.
Date
Not mailed. en:Southern Pacific class MC-2 had a long service record-from 1909 to 1949. Dating the postcard stamp box indicates the card was published between 1907 and the 1920s. To be certain this is properly licensed, I am licensing it as Pre-1978.
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.