At the very beginning of the movie when Harry and Sally first meet through their friend, Harry finally gets into the car and when there is a view through the glass, there isn't a rear view mirror... Did the automotive designer forget this?
My friend had an older model car that only had one mirror. Being an older movie, the car is probably an old model that was manufactured with one mirror.
i had a 1987 dodge omni, i miss that car, and i had only one side mirror and it was on the drivers side. cars even older than that, i mean WAYYY older, the rearview mirror wasnt even up high it was mounted to the dashboard.