$ 500,000 ... Yes, yes, you did not misheard! That is how much these turbiion watches cost!
Zenith: Zero-G Tourbillon

Zenith Defy Xtreme Tourbillon Zero-G
El Primero Zero-G, as always the first made of black titanium and covered with a solution of physically chilled vapors, as the manufacturer claims, spits on gravity. The gravity does not affect the clock in general. They will work even in space.
The carriage of the mechanism is suspended so that it all the time seeks to take a horizontal position. Thanks to this, time is always particularly accurate, just with an error of a couple of seconds.

Zenith Defy Classic Tourbillon Zero-G
The clock is made in two models: Defy XTREME - by the name it is clear that the clock is executed with emphasis on extreme conditions, and Defy Classic, respectively, I think from the name is understandable.
Madly expensive, but you can dream ...
All on the moon !!!