The classical music playing in the background of the scene where Harvey meets his wife (mins 4-5) is Bach's Brandenburg Concerto as conducted by Karl Richter. But it wasn't produced until 1967, four years after the time when the episode takes place.
Despite all the vintage cars on the street, and the 60s appearance of the neighborhoods, there is modern Cable TV facilities as they pan down to street level in several scenes. Director should have caught that. IMO.