Has anybody seen this add floating around on social media? It's from 1900 from what I've read, but boy is it relevant! I make so many calls to my family each day I'm often afraid I'm going to set the dial on fire.
I have seen 3 versions online, Central Union, New York and this one from Missouri. I have read they were used for fillers in directories. Recently Snopes wrote an article and had a link to news paper page.
https://www.snopes.com/fact-check/1918-quarantine-ad-for-phone/