| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | mid-Dec | |
| Winter | Spring | Summer | Fall | Winter | |||||||||
| 1943 | [X] |
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| 1944 | [X] |
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | mid-Dec | |
| Winter | Spring | Summer | Fall | Winter | |||||||||
| 1948 | # 1 |
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | mid-Dec | |
| Winter | Spring | Summer | Fall | Winter | |||||||||
| 1963 | #23 Jan |
#29 Apr |
#37 Aug |
#43 Nov |
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | mid-Dec | |
| Winter | Spring | Summer | Fall | Winter | |||||||||
| 1949 | Summer | ||||||||||||
--- see under Mystic Magazine (1953).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | mid-Dec | |
| Winter | Spring | Summer | Fall | Winter | |||||||||
| 1892 | v1 #1 Mar |
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | mid-Dec | |
| Winter | Spring | Summer | Fall | Winter | |||||||||
| 1962 | v3 #6 Jun |
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | mid-Dec | |
| Winter | Spring | Summer | Fall | Winter | |||||||||
| 1952 | May | ||||||||||||
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | mid-Dec | |
| Winter | Spring | Summer | Fall | Winter | |||||||||
| 1949 | #1 Summer |
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | mid-Dec | |
| Winter | Spring | Summer | Fall | Winter | |||||||||
| 1923 | Jan | ||||||||||||
| 1925 | Jan | ||||||||||||
For the first couple of years the magazine was actually titled Secret Agent X" but in November 1935 it settled down to Secret Agent X by which title it is generally known.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | mid-Dec | |
| Winter | Spring | Summer | Fall | Winter | |||||||||
| 1934 | v1 #1 Feb |
v1 #2 Mar |
v1 #3 Apr |
v2 #1 May |
v2 #2 Jun |
v2 #3 Aug |
v3 #1 Sep |
v3 #2 Oct |
v3 #3 Nov |
v4 #1 Dec |
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| 1935 | v4 #2 Jan |
v4 #3 Feb |
v5 #1 Mar |
v5 #2 Apr |
v5 #3 Jun |
v6 #1 Jul |
v6 #2 Aug |
v6 #3 Sep |
v7 #1 Oct |
v7 #2 Nov |
v7 #3 Dec |
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| 1936 | v7 #4 Jan |
v8 #1 Feb |
v8 #2 Mar |
v8 #3 Apr |
v8 #4 Jun |
v9 #1 Aug |
v9 #2 Oct |
v9 #3 Dec |
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| 1937 | v9 #4 Feb |
v10 #1 Apr |
v12 #1 Jun |
v12 #2 Aug |
v12 #3 Oct |
v12 #4 Dec |
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| 1938 | v13 #1 Feb |
v13 #3 Apr |
v13 #4 Jun |
v14 #1 Sep |
v14 #2 Dec |
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| 1939 | v14 #3 Mar |
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Secret Confessions combined with Love Revelations (about)
--- see under Red Star Love Revelations.
Secret Love Revelations (about)
--- see under Red Star Love Revelations.
Secret Memoirs of Gallant Men and Fair Women (about)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | mid-Dec | |
| Winter | Spring | Summer | Fall | Winter | |||||||||
| 1927 | v2 #7 Oct |
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