Both the front and back sides of the photo have no copyright markings on it as can be seen in the link above, therefore it lapsed into public domain.
Licensing
Public domainPublic domainfalsefalse
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.
Uploaded a work by Syndication International Ltd. from [https://www.ebay.com/itm/164848513473?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=izBiwge1TGK&sssrc=2047675&ssuid=&widget_ver=artemis&media=COPY Chris Crosby & wife Britt Semand - 1966 Syndication International Photo] with UploadWizard
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