This is an odd magazine. The cover is a straight copy of Dime Mystery July 1938, with the word Dime removed and a red border around it. There is no date, and it is not listed in Bookery’s Guide to Pulps.
Also, Flesh For The Swamp Men
This entire issue can be downloaded here
Also, Terror Beneath The Streets
Also, Pop Egan and the Restless Killer
Also, Caverns Of The Damned