Hottentot lobby card - Vintage movie public domain poster

Lobby card for the American comedy film The Hottentot (1929).
The item has no copyright markings on it as can be seen in the links above. At lower left is Country of Origin USA. There are two cards shown in the link. This is the top one. Both have Country of Origin USA at lower left; the mark is not as clear on the top card as it is on the bottom one. The bottom card has more damage to it, so it's provided for reference re: easier to read mark.
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."