This "four foot" phone dial reminded me of the 1927 film teaching Fresno County residents how to use a dial phone. While you are there at archive.org you can watch the 1949 short film "Life in the Central Valley", or the Kirk Douglas feature The Big Trees where he and some Quakers have different ideas about sequoia trees.
When push buttons replaced the telephone dial, I wonder if a film was made explaining why the numbers on a calculator are arranged differently than numbers on a telephone? :)
