I have an old Soviet mechanical wristwatch that cost 3€ on an Eastern German flea market.
Compared to other watches it sounds like a Diesel tractor, the bezel rotates freely and the wristband pulls my arm hair out.
When I wear it, it’s too fast and when I don’t wear it, it’s too slow.
But I only wear it during the day and take it off at night, and that way it’s been keeping perfect time for 15 years.
I used to have an old Zenit ET. I loved that thing cause it had a small solar cell that powered the lightmeter (which was just an analog indicator moving over a scale).
So it needed no batteries.
When I moved to a new place I accidentally toppled an oak wood wardrobe which fell on the camera.
The wardrobe then had a hole in its back panel, the camera still worked fine.