I've seen this before, and it's a paragon of how to explain and demonstrate mechanical concepts.
This person needs to be hired by someone full time to produce this kind of page for all the things.
Thanks for reminding me it exists.

***edit to add:
Omg I found archives of more! https://ciechanow.ski/archives/

Respect to them for modeling and animating that, making it render real time in web for the demonstration, that's sick

Truly incredible article

I have managed to lose track of time while reading about how we track time.

Omg the winding rotor moves as you spin the animation around!

I love seeing this masterpiece of an article shared around. Really incredible stuff!

Did I miss the self winding mechanism? To me the most impressive mechanical watches are the self winders.

This is the article that got me into mechanical watches. I can’t afford a super expensive one, but I got my second last fall and it not only has a chronograph function but also has radioactive tritium tubes in the hands and time notches so it glows in the dark under its own power!