The printing press Howie and Opie use is the Ideal Printing Press, a toy that sold for 11.44.
Barney's gossip about the Widow Saunders and the dishtowel salesman later winds up as a bullet in Opie and Howie's newspaper.
In this episode, Andy, Barney and Aunt Bee are searching through the city dump looking for the undistributed edition of Opie's Newspaper. In an earlier episode, "The Lucky Letter," Andy and Barney are searching through the city dump looking for a chain letter that Barney desperately thinks he needs. The dump scenery is practically identical in each episode.
TV's M*A*S*H "Depressing News" (1981) uses some of the same lines, when Klinger first starts his base newspaper M*A*S*H Notes (like telling the first subscriber, "You just doubled the circulation.")