1) Full cover title is "Doctor No by Ian Fleming. 2) In Amazing World of DC Comics #10, in the article "There's No Cases Like Showcases", Jack C. Harris notes, "One of Ian Flemming's [sic] popular James Bond novels had just been made into a feature-film and DC acquired a comic adaptation originally prepared like Classics Illustrated. So Showcase #43... featured 007's clash with the infamous Dr. No! A Bob Brown cover surrounded the unique, ad-free 32-page James Bond thriller." 3) The hero on the cover does not resemble Sean Connery, but the interior art is dead-on Connery.
On-sale date from copyright registration.
Inside front cover. (c) 1963 by National Periodical Publications, Inc.
A end line reads, "Tommy Tomorrow returns with startling adventures in the May-June #44 issues of SHOWCASE."
Inside back cover.