Sub-Mariner 1968 #31 - reader copy - $4.00

Namor returns to Atlantis to discover that Attuma has abducted Ikthon, his chief scientist. While Attuma forces Ikthon to build a ?Devil Machine? to invade Atlantis, his warriors sink a cruise ship to further his plan to ignite a war between Atlantis and the Surface World. Triton and Stingray join Namor to confront the barbarian warlord.

Jim saves Big Joe's little sister when she wanders onto the field during the high school football game.

Ad for karate book and life-size dummy, $1.98.

Ad for 7-foot tall glow-in-the-dark monster posters.

On-sale date from 1970 Periodicals, Copyright Office, Library of Congress with a correction factor of plus 28 days.

• The Battle of the Titans! - Marie Severin provided a preliminary cover design on yellow 8.5" x 11" paper for Sal Buscema to work from.
• - Inside front cover. Ad for a scale model of the Ford Model "T" ice truck by Monogram.
• Attuma Triumphant! - Sub-Mariner last appeared in Fantastic Four (Marvel, 1961 series) #104. The Thing is watching Gladys and Tyrone on a rerun of Rowan & Martin's Laugh-In. This issue has 20 numbered pages with pages 12 and 13 being half pages.
• Danger on the Field - Ad in comic format for Lee Leens jeans. H. D. Lee Company, Inc., Fashion Division, PO Box 440, Shawnee Mission, Kansas 66201 between story pages 3 and 4.
• - Between story pages 6 & 7 on upper portion of page.
• - Between story pages 6 and 7 on lower half of page. Ad for Marvelmania magazine.
• - Ad for the "Weider System" of body building between story pages 6 and 7.
• - Recruitment ad for sales people for Grit newspaper, between story pages 9 and 10.
• - Beneath story half-page numbered 12.
• - Ad, with order coupon, from Hobby Coin Co., located beneath story half-page numbered 13.
• Shop by Mail - Thumbnail ads, including ads for back-issue comics, between story pages numbered 15 and 16.
• Shop by Mail; Stamps - Thumbnail ads, including ads for back-issue comics, between story pages numbered 18 and 19.
• - Includes Items; Stan's Soapbox.
• - Located on top half of page.
• Shop by Mail - Thumbnail ads, including ads for back-issue comics, located on lower half of page.
• - Letters from: Garrett Everett, Bob Krotts, Van Hunt, and Neal Pozner. Includes ?Know Ye These, the Hallowed Ranks of Marveldom.?
• - House ad for Daredevil (Marvel, 1964 series) #69 with only the top half of the cover depicted. Advertised as "Now On Sale!" Located under the second page of the letters column.
• - Ad for the Academy for Home Study.
• - Inside back cover. Ad for the Junior Sales Club of America.
• - Back cover. Ad for the Famous Artists School.