This is Horror Stories for August-September 1939, cover artist unrecorded. The ISFDB entry for this issue is here. I found this version of the cover (possibly the only one on the net) at this French-language collectors’ site.
This is Horror Stories for August-September 1939, cover artist unrecorded. The ISFDB entry for this issue is here. I found this version of the cover (possibly the only one on the net) at this French-language collectors’ site.