Statement of Ownership average # of copies in preceding 12 months: 404,314.
Byrrah, Namor's cousin, is re-introduced from the continuity of the 1950's.
Pages 10-12 have uncredited art/corrections by Marie Severin with inking likely by John Tartaglione. Info per Nick Caputo, September 2014.
Kuramoto lettering credit also by Nick, who explains it is based upon an examination of lettering styles. Previous indexer credited Ray Holloway as using the pseudonym "Sherigail" but the name was derived from Morrie Kuramoto's wife and daughter, Gail and Sherry, as noted here:
Letters from Bobby Stewart, Bill Mantlo (future comics writer), Charlie Gregor, Scott Planeta and images from earlier issues.