heavy wrist

This Zenith El Primero 8800 Zero G Tourbillon sports a gimbal-mounted tourbillon, which defies the (such miniscule) effects of gravity on the moving parts of the watch to maintain an accurate reading. Colors come in black titanium (shown) and rose gold. Price tag reads $512,000. That's like a whole house on your wrist.

Here's another gravity-defiant watch you can rock on your wrist for the same amount of a slightly smaller house. Jaeger-LeCoultre Gyrotourbillon Two at $492,650.
Check the engineering on that. Looks like a time machine.