Although it only lasted 5 issues, UNCANNY TALES features one of the more confusing dating situations pulp fans will encounter.  The first issue was apparently the April-May 1939 issue, which is labelled volume 2, number 6.  The other issues were dated August 1939 (v.3, #1), November 1939 (v.3, #2), March 1940 (v.3, #3) and May 1940 (v.3, #4).  Pulp giant Norman Saunders contributed the cover to the August 1939 issue, and may have painted the covers to some or all of the other issues.