Here's a 1974 double bill herald for a re-release of the Flash Gordon and Buck Rogers space operas, Mars Attacks the World and Planet Outlaws. I'm more partial to Buck Rogers, but Flash was pretty cool too. Larry "Buster" Crabbe really made the characters come to life on the big screen. These serials and subsequent movies influenced a lot of creative people, Steven Spielberg being one of them. This is also a good example of the newspaper-styled herald some movies used for promotion. Notice also that this one isn't a pressbook sample: it has theater information printed on it. I'm guessing this was a college showing, based on the theater names, lack of location information, and the fact that colleges would do programs like this back in the 1970s, when fandom was beginning to pay attention to the serial heroes.