This issue has variants.
Reprints Marvel Mystery Comics (Marvel, 1939 Series) #5-8.
Illustrated with a detail from Marvel Mystery Comics (Marvel, 1939 series) #7 (May 1940).
The last part of page two features the "Marvel Comics Contest Winners, February 1940 issue No. 4". The 1st prize of $5 went to Kris Dalman and the 2nd prize of $2 went to Frank Salvaldare Quarttrocchi. An additional 18 winners of $1 each were also listed.
House ad for Mystic Comics #3 and Daring Mystery Comics #5.
On back cover.