Secret Agent M-11. Ken Croydon, “Spy Operative M-11,” works for an unnamed American counter intelligence agency and fights against "foreign spies and dangerous espionage agents."Secret Agent M-11. Ken Croydon, “Spy Operative M-11,” works for an unnamed American counter intelligence agency and fights against "foreign spies and dangerous espionage agents."
First Appearance: Prize Comics #1 (Prize), Mar 1940. 4 appearances, 1940. Created by H. Cardwell and ?
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