One of two ashcan produced that did not secure the trademarks. The other is Thrill Comics (Fawcett, 1940 series).
This title has two known issues. One version features the Golden Arrow. The other version features early version of Captain Marvel named Captain Thunder.
Unable to secure trademarks for Thrill, Flash, or Captain Thunder, Captain Thunder would be renamed as Captain Marvel. Thrill and Flash renamed as Whiz Comics with issue #2.