I have always had a problem with that film. If you look at the film on Youtube, you will see a wall phone behind the scene that has a coiled cord.
My research revealed that the phone and the coiled cord were not made available until 1957. Being old, born in 1951, I remember when the coiled cord came to the market.
That always made the film dubious to me.
Take a few minutes and try to find a coiled cord before 1957.
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