REAL MYSTERY MAGAZINE, debuting in April 1940, was a reprint magazine for the same publisher's other weird menace pulps, MYSTERY TALES and UNCANNY TALES, both of which ceased publication in May 1940.  However, as there was no indication in the magazine itself that the stories were reprinted (and were given new titles), the publisher, Western Fiction Publishing Co., ran into trouble with the FTC.  From and after that point, reprints had to be noted as such in the pulps.