Newspaper Daily, Feb 01-02 1939Spanning from approximately 1938 - 1955 is the Golden Age of comics, the original Superman stories as started by Siegel and Shuster including the comic books and the daily newspaper comics. (Some break this age period in half by the Golden Age, and the "Flux" age where they start setting up the Silver Age in the late forties.)
This, of course, sees the first introduction of Clark Kent (Kal-L) and Lois Lane, and of course other milestones including Perry White and Jimmy Olsen. The first comics start out in Cleveland where they work for the Daily Star, and later in the Daily Planet. It is this age that set up Clark Kent as a disguise and Superman as the real man of the story; Lois of course falls for Superman who initially wants nothing to do with her.