Up for sale is one of the biggest keys in the Marvel Silver Age class, from 1963. Tales of Suspense #39, which originally started out as a sci-fi anthology series, certainly became known thereafter for Iron Man (and later Captain America) with the huge introduction, origin, and very first appearance of one of Marvel's most beloved characters: Iron Man (aka Tony Stark). Apparently Stan Lee and Jack Kirby couldn't quite figure out what color Iron Man's armor should be. It starts out here as a pretty boring grey, becomes yellow with the next issue (#40) (not much of an improvement) before finally settling on the yellow/red combination that became iconic.
This copy is a CGC 3.0 and has excellent page quality Off-White to White.... 2nd highest CGC awarded page color. I have this copy priced as the best value on this site, relative to nearby grades.
Search and see for yourself. The item "Tales of Suspense #39 CGC 3.0 Origin & 1st Appearance of Iron Man Huge Key" is in sale since Wednesday, September 11, 2019. This item is in the category "Collectibles\Comics\Silver Age (1956-69)\Superhero\Iron Man". The seller is "mattnathan69" and is located in Littleton, Colorado. This item can be shipped to United States.