What's the oldest piece of machinery that you own that still works, for its original purpose, in (mostly!) its original state?
@NanoRaptor I have a hand-cranked drill that belonged to my great grandfather, and maybe one of his uncles before that. It's at least 100 years old, probably older than that, similar to the one in this article: https://www.instructables.com/Old-school-hand-drill-overhaul/
Still works great!