Another cover by Stephen Salter. The magazine went by the title “The Magazine of Fantasy & Science Fiction” from February of 1951 through September of 1952, when it reverted to and remained as “The Magazine of Fantasy and Science Fiction“.
Though subtle, the “&” symbol in the title was actually the silhouette of a smiling impish face, and also forms the bottom part of the letter “F” in the word “Fantasy“. (You can see it, below.) This symbol seems to have been the magazine’s unofficial logo, and was displayed on the back cover (and randomly in the interior) during the 1950s. (Information from VISCO.)