Metal Men #15

A towering, riveted monster robot dominates the left side of this 1965 DC cover, boasting that a single shot from his head will reduce the Metal Men to "a bunch of bolts" — while Gold, Platinum, and their teammates fire back with a defiant "Nuts!" from the right. Ross Andru and Mike Esposito deliver a wonderfully kinetic split-panel composition that pits hulking mechanical menace against the colorful, humanoid Metal Men, with the cover blurb warning of "a whole army of secret weapons" hidden inside that massive robotic skull. It's a fun, punchy snapshot of everything that made DC's robot team book such a lively corner of Silver Age comics.