David and the Stewardess - S6-E15
Other mistake: Rick is playing an acoustic guitar in his bedroom, but the sound we hear is that of an electric guitar.
The Adventures of Ozzie & Harriet (1952)
1 mistake in David and the Stewardess
Starring: Harriet Hilliard, Ricky Nelson, David Nelson, Ozzie Nelson
Trivia: In the later seasons, almost every scene taking place at the Dobson and Kelly law office or in the Emporium or other local business is preceded by the same clip of a downtown street showing "First Bank" and a passing bus.