Sub-Mariner 1968 #21 - back issue - $15.00

With a city wide dragnet being used to capture the Sub-Mariner, Lady Dorma decides to send the Atlantean army to attack New York City to rescue Namor. Namor tries to alleviate the situation, but Lord Seth uses the Proteus Horn to call forth three giant turtle monsters to attack. Namor tries desperately to fight the monsters off and convince everyone that war is not the answer. Realizing this, Seth then uses to horn to call off the giant turtles but gets killed when he inadvertently gets buried by an undersea quake alongside the monsters.

Ad for free "Drafting Career Kit".

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

On-sale date from 1969 Periodicals, Copyright Office, Library of Congress with a correction factor of plus 28 days.

• - Inside front cover. Ad for a catalog from the Johnson Smith Company.
• - Ad, with order coupon, from Hobby Coin Co. on top half of page between story pages 3 and 4.
• - Between story pages 3 and 4, on lower half of page.
• - Includes: Stan's Soapbox; Items!; The Mighty Marvel Checklist; thumbnail ad for Fantastic Four Annual (Marvel, 1963 series) #7 and Amazing Spider-Man Annual (Marvel, 1964 series) #6 Between story pages 6 and 7.
• - Ad for jigsaw puzzles featuring images of Matchbox vehicles, located on top half of page, between story pages 6 and 7.
• - Ad for selling Grit by the Grit Publishing Co., on lower half of page between story pages 6 and 7.
• - Ad for books from Audel Practical Guides, between story pages 9 and 10.
• - Between story pages 15 and 16, on top half of page.
• Shop By Mail; Stamps - Various ads for stamps, novelty items, and back-issue comic books. Appears between story pages 15 and 16 on lower half of page.
• - Thumbnail ads for novelty items and back-issue comic books. Appears between story pages 18 and 19.
• Shop by Mail - Thumbnail ads for novelty items and back-issue comic books. Appears between story pages 18 and 19.
• - House ad for Avengers (Marvel, 1963 series) #71 and Thor (Marvel, 1966 series) #171.
• - Ad for novelty items from Honor House Prod. Corp.
• - Letters from Robert Kern, Eric Shrattner, Deborah O'Ciardha, Harry A. Hopkins, Bill Malcolm, and Craig Minor; includes ?Know Ye These, the Hallowed Ranks of Marveldom.?
• - Ad for the Wayne High School Program.
• - Inside back cover. Ad for a weight gain supplement.
• - Back cover. Ad for the Famous Artists School.