Sep 1949 to Aug 1950
Issues Published: 6
(#4 - #9)
numbering continues with Diary Secrets (St. John, 1952 series) #10
Issues #7 and 9 were digest sized; others were regular U.S. Golden Age sized.
See also Blue Ribbon Comics (St. John, 1949 series) #2 (Diary Secrets), #4 (Teen-Age Diary Secrets) and #5 (Teen-Age Diary Secrets), which are considered to be the first three issues of this series and Giant Comics Editions (St. John, 1948 series) #12 (Diary Secrets, Matt Baker cover)