This work is in the public domain because it was published in the United States between 1978 and March 1, 1989 without a copyright notice, and its copyright was not subsequently registered with the U.S. Copyright Office within 5 years.
Unless its author has been dead for several years, it is copyrighted in the countries or areas that do not apply the rule of the shorter term for US works, such as Canada (50 pma), Mainland China (50 pma, not Hong Kong or Macau), Germany (70 pma), Mexico (100 pma), Switzerland (70 pma), and other countries with individual treaties. See this page for further explanation.
Wrestling's Main Event magazine was part of the same family of professional wrestling magazines as Pro Wrestling Illustrated (known as "Apter Mags"). Pro Wrestling Illustrated (PWI) is still in publication as of today. PWI (seemingly) did not begin printing clear-cut copyright notices until the year 2000, when it began attributing its copyright to "London Publishing Co." Likewise, publications in the same family of magazines also failed to correctly assign copyright. Wrestling's Main Event does not correctly assert copyright anywhere within its pages, failing 2 of 3 requirements listed on w:Copyright notice#Form of notice for visually perceptible copies.
Captions
Tongan professional wrestler King Tonga (King Haku) in November 1983
Uploaded a work by {{Unknown photographer}} from [https://archive.org/details/wrestlings-main-event-1983-11-outlaw-ron-bass-b/page/25/mode/1up with UploadWizard