Published in June 1965, Tales of Suspense #66 is one of the most significant Silver Age Marvel keys of the mid-1960s. This issue features the origin and first Silver Age appearance of the original Red Skull (Johann Schmidt), reintroducing Captain America's greatest wartime adversary to Marvel readers. The issue also features appearances by Attuma and Hitler, further cementing its importance within Captain America's mythology. Created by an all-star creative team including Stan Lee, Jack Kirby, Don Heck, Mike Esposito, Chic Stone, and Frank Giacoia, this issue represents Marvel storytelling at its peak during the Silver Age. The striking split-cover design highlighting both Iron Man and Captain America has become one of the most recognizable covers of the Tales of Suspense run. Professionally graded CGC 7.5 Off-White to White Pages, this certified copy offers exceptional eye appeal for a major Silver Age key. High-grade examples of this issue remain in strong demand due to Red Skull's status as one of Marvel's most iconic villains and the continued popularity of Captain America across comics and film. A cornerstone Silver Age Marvel key and an outstanding addition to any Captain America, Iron Man, or premier Marvel collection.