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 Record Produced By Dr. C. A. ROBERTS, Houston, Texas World Records from [https://www.ebay.com/itm/334672823352 Bob's Marriage Repair Kit, Bob Harrington, R-5, 1965, 33RPM, 3844,] with UploadWizard