Most complicated thingy

[bisonbison]

Guys, you need to lighten up. I need someone to tell me about the most complicated device ever made by man that fits these criteria:

No electricity, no combustion, no steam. No strange power source I haven't accounted for.

Purely mechanical power (horse, river, wind power, man pushing button to activate spring...) is fine.

The typewriter?
The windmill?
The something else entirely?



The winner? Everything I own.