During the period fans and historians call the Silver Age of Comic Books, Iron Man premiered in "Tales of Suspense" #39 (March 1963) as a collaboration among editor and story-plotter Lee, scriptwriter Larry Lieber, story-artist Heck, and Kirby, who provided the cover pencils and designed the first Iron Man armor. Kirby "designed the costume," Heck recalled, "because he was doing the cover. The covers were always done first. But I created the look of the characters, like Tony Stark and his secretary Pepper Potts." Comics historian and former Kirby assistant Mark Evanier, investigating claims of Kirby's involvement in the creation of both Iron Man and Daredevil, interviewed Kirby and Heck on the subject, years before their deaths, and concluded that Kirby