Superman's Pal, Jimmy Olsen #63

From September 1962, this issue of Superman's Pal, Jimmy Olsen promises a genuinely wild premise right on its cover: a smug figure in a green suit holds what appears to be a ray device, while a miniature bottled city sits in the foreground and a trio of Superman-like figures — including what looks like a tiny Superman — react in alarm behind him. Cover dialogue hints at a Kryptonian impostor escaping from the shrunken city of Kandor, and the featured story "The League of Fantastic Supermen" suggests the scale of the threat only grows from there. Curt Swan and George Klein deliver their typically clean, expressive linework, making this a vivid snapshot of the Silver Age DC imagination firing on all cylinders.