English: Undated; circulated circa 1970, when Two Mules for Sister Sara was released. Photo taken during the shooting of the film, which took place between February 3–mid-May 1969 (source: AFI).

English: Originally printed as a publicity photograph distributed by Universal Pictures. Scans of the original, front and back, can be seen via Catawiki here and here. Image retouched by uploader based on various scans online.

English: "© Universal Pictures". Photographer unknown—possibly "A.J. Corso", per the first Catawiki listing above.

English: No permission is required because the publicity photo was distributed without a valid copyright notice. The pre-1989 requirements for copyright notice were highly formalistic and, other than a few enumerated exceptions, required these three elements:

1. "The symbol © or the word 'Copyright' or the abbreviation 'Copr.' or an acceptable variant such as "(c)";
2. "The year of first publication for the work"; and
3. "The name of the copyright owner, or an abbreviation by which the name can be recognized, or a generally known alternative designation of the owner."

If just one of these elements is omitted, the work is deemed to be published without notice and is not eligible for copyright protection. As seen in both "original source" links above, the image was printed and distributed with the notice "© Universal Pictures", omitting the year and rendering the notice defective. As such, the photo entered the public domain upon publication.