by Edmund Emshwiller
This cover is from 1954. I have seen this cover credited to Ed Valigursky, William Timmins, and Edmund Emshwiller. I’m going with Emshwiller because it appears that he signed his work.
Artwork of the Day: The Humanoids (by Edmund Emshwiller)
Through the Shattered Lens 
A young Bobby Heenan must have enjoyed reading this story.
If you know, you know.
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