When you're coming up with the options list for a car that starts close to a quarter million dollars, you have to offer more than upgraded leather and massaging seats. In the Bentley Bentayga, you'll be able to choose a fancy clock that will set you back $160,000.

Springing for an upgraded clock has the potential to be a huge waste of money, but instead of licensing the name of a watchmaker and slapping it on the face of a clock that's nothing special, Bentley brought Breitling in to create a clock that's actually worth paying for.

Called the Mulliner Tourbillon, the Bentayga's optional clock is a mechanical masterpiece. Fully mechanical with no electronic doodadery inside, the clock is self-winding like a fine wrist-worn timepiece. As seen above, an electric motor rotates the clock every so often to ensure it never runs out of power.

It's beautiful, and amazingly engineered, even if it is hideously ostentatious and exorbitantly priced. Plus, you could watch the video of it winding itself for hours.

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