Someone was fortunate enough to recover a 300 baud modem manufactured by Livermore Data Systems, manufactured circa 1964. It is a true acoustic modem with the large transducers and all. And, the best part, it still works as the video below will show.
This is as old-school as you can get concerning modems. Bear in mind this is pre-Hayes era.
In the demo below, the modem is connected, dialed and uses the Lynx text browser to surf the internet. It’s slow-slow-slow, but totally amazing considering it is FORTY-FIVE YEARS OLD.
Do you have anything tech that’s forty-five years old and still works? Probably not.

That’s as old as me! – It’s hard to believe they had electronics when I was born; but there’s the proof.
I really enjoyed watching that. Many thanks for sharing.