Dance Madness poster - Vintage movie public domain poster

Window poster for the American film Dance Madness (1926).
There are no copyright marks on the item. At lower left is Country of origin and production USA. At lower right is Tooker Print Co., NY, NY.-they printed the poster.
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.
1 The symbol © (letter C in a circle); the word “Copyright”; or the abbreviation “Copr.”
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.
3 The name of the copyright owner, an abbreviation by which the name can be recognized, or a generally known alternative designation of owner.1 Example © 2007 Jane Doe."