This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionAll Quiet on the Western Front (1930 film) poster.jpg
English: Poster for the 1930 film All Quiet on the Western Front.
The item has no copyright markings on it as can be seen in the links above. At lower right is a logo for the Morgan Litho Company--they printed the poster-and numbers which likely related to the poster print job.. At lower left is Country of origin USA.
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.
The author died in 1952, so this work is also in the public domain in jurisdictions where the copyright term is the author's life plus 70 years or less. This work may also be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.