Short PSA Made By AT&T In 1936 To Help Familiarize Viewers With Dial Telephones...
If you wanted to make a non-local call back in 1936 you typically had to speak to a switchboard operator, who would connect your call to a number that began with exchange letters related to the location you were calling....
https://www.neatorama.com/2017/01/06/Short-PSA-Made-By-ATT-In-1936-To-Help-Familiarize-Viewers-With-Dial-Telephones/
