As part of Super-Hearing, I want to trace how the Superman radio show was promoted in comic books. This ad from ACTION COMICS #25 picks up largely from the one in ACTION COMICS #24, but adds listings for stations in Washington and Baltimore airing the show.

Also of note is a change in sponsor from H-O Oats to Force, a toasted wheat flakes cereal produced by the same company. Force would be the most prominent sponsor of the show during its syndicated run.