Fantastic Four 1961 #81 - back issue

Crystal joins the team while Sue is recovering from Franklin's birth. The Wizard attacks the Baxter Building.

On-sale date from 1968 Periodicals, Copyright Office, Library of Congress.

• - Inside front cover. Ad for the "007" Twister from Joe Weider.
• Enter -- The Exquisite Elemental! - Kirby's co-plot credit is widely acknowledged by Lee and Kirby in numerous interviews. Credit here reads: "Profoundly produced by: Stan (The Man) Lee and Jack (King) Kirby."
• - Ad solicits boys to sell Grit magazine. Located between story pages 3 and 4.
• - Between story pages 6 and 7. Promo for inflatable Spider-Man and Thor plastic pillows. $1.50 each plus 15 cents postage. Also Marvel super-hero t-shirts featuring Captain Marvel, Spider-Man, Thor, and the Hulk. $2.00 each including postage. And The Merry Marvel Marching Society Membership Kit for $1.00. Two mail-in coupons: Marvel Comics Group (Dept. PP or Dept. AJ) 625 Madison Ave., N.Y.C., N.Y 10022.
• Free! Giant Stallion Mural Full Color Masterpiece Free! - Ad for oil painting reproductions of majestic horses, between story pages 6 and 7.
• World's Fastest Train - Illustrated ad for Cheerios breakfast cereal, featuring the "New Tokaido" train in Japan, which makes a 320.2 mile trip averaging 101 miles per hour. Located between story pages 9 and 10.
• - Ad, with order coupon, from Hobby Coin Co., located between story pages 15 and 16, on top half of page.
• Stamps; Shop by Mail - Seventeen small ads between story pages 15 and 16, on lower half of page.
• Shop by Mail - Small ads, between story pages 18 and 19.
• - Includes: Stan's Soapbox; Items; The Mighty Marvel Checklist.
• - Ad for H. H. Ward & Co., Inc. hair restorer.
• - Letters from: Karl Reif, Charles Bromley, Gary Davis, Ray Whitson, Dudley Bolbat, F. James Mohl, Marshall Strauss, and Achille Di Bacco; includes Know Ye These, the Hallowed Ranks of Marveldom.
• - House ad for Fantastic Four Annual (Marvel, 1963 series) #6, The Spectacular Spider-Man (Marvel, 1968 series) #2, and The Amazing Spider-Man Annual (Marvel, 1964 series) #5, advertised as "Now on Sale!"
• - Inside back cover. Ad for the Creative Card Company.
• - Back cover. Ad for the Famous Artists Schools.