The on-sale date is the publication date reported in the U. S. Copyright Office filings.
Dick Ayers has confirmed to Nick Caputo that he inked this cover (GCD Error List 2 November 2006).
Letters page replies by Stan Lee. Illustrations from earlier stories. The bottom of the letters page includes this ad: "IMPORTANT NOTE: The FANTASTIC FOUR make a guest appearance in the new AMAZING SPIDER-MAN comics, # 1, on sale December 10th. DON'T MISS IT!"