"A notice for the collective work will not serve as the notice for advertisements inserted on behalf of persons other than the copyright owner of the collective work. These advertisements should each bear a separate notice in the name of the copyright owner of the advertisement."
Copyright for Billboard magazine would not affect this non-marked Decca Records ad. Decca didn't label their ad as under copyright.
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.
{{Information |Description={{en|Photo of Bill Haley and his Comets.<br/> *Decca Records issued the ad without any copyright marks or notations. *The photo is a larger version of that in the Decca ad. *[http://www.copyright.gov/circs/circ03.pdf US Copyr...