There are no copyright marks. At bottom is Country of origin USA, Morgan Litho Corp Cleveland, O. and 12204.
United States Copyright Office page 2 "Visually Perceptible Copies The notice for visually perceptible copies should contain all three elements described below. They should appear together or in close proximity on the copies.
2 The year of first publication. If the work is a derivative work or a compilation incorporating previously published material, the year date of first publication of the derivative work or compilation is sufficient. Examples of derivative works are translations or dramatizations; an example of a compilation is an anthology. The year may be omitted when a pictorial, graphic, or sculptural work, with accompanying textual matter, if any, is reproduced in or on greeting cards, postcards, stationery, jewelry, dolls, toys, or useful articles.
{{Information |Description=Poster for the 1931 film ''Corsair''. |Source=[https://web.archive.org/web/20170421031056/http://moviecovers.com/film/titre_CORSAIR%20(1931)%20(1931).html source] |Date=[http://www.imdb.com/title/tt0021764/?ref_=nv_sr_1 1931]...