Peter depicting the famous "twin Earths" imagery that would later be associated with DC's concept of the Multiverse.
[1] The story is credited to Robert Kanigher who used the pseudonym of "Charles Moulton" as an in-house author name following the passing of William Moulton Marston, the original author of Wonder Woman.
Peter, the original artist for Wonder Woman, is credited with this story's artwork but had a team of assistants aiding him in his final years on the magazine, most of whom remain unknown.
A 5-issue DC Crossover starting in July 1998 involving Green Arrow (vol.
[bn] Note: All bolded events are considered "company-wide".