The Rawhide Kid #21

The Rawhide Kid faces down three hard-looking gunmen on this cover by Jack Kirby and Dick Ayers — the Kid, seen from behind astride his horse in a sharp blue outfit, coolly declares himself outnumbered but unbothered as the trio crowds in with drawn weapons. The banner promises "The Gunmen of Sundown City!" inside, and with Stan Lee writing and Kirby drawing, this April 1961 issue delivers exactly the kind of tense frontier confrontation that made the title a standout Western of its era.