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The description on its file description page there is shown below.
Summary
DescriptionMaggie Smith - Vintage (trim).jpg
English: Press photo of Dame Maggie Smith c1970 (late '60s/early '70s), published and distributed during the free domain period prior to 1977), for the intent of publicity.
The photo has no copyright markings on it as can be seen in the links above and in the copy of the file showing the back, uploaded separately (as was done in the eBay source link above.
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.