This is the cover for Marvel Science Stories for November 1938, cover by Frank R. Paul. The ISFDB entry for this issue is here. I found this version of the cover at Pulp Covers, the curators of which have also made the entire issue available for download. As an example of this issue’s interior art, this illustration to Henry Kuttner’s cover story “The Time Trap,” also by Frank R. Paul.
This is Marvel Science Stories for November 1950, cover by Norman Saunders. The ISFDB entry for this issue is here. I found this version of the cover at Pulp Covers, where the curators also include some interior art, including this piece by Frank R. Paul illustrating Lloyd Arthur Eschback’s “Overlord of Earth.”
And this rather dynamic illustration by Vincent Napoli illustrating A Bertram Chandler’s “Fire Brand!”
You can download and read the entire issue at the Internet Archive.