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IWC Ingenieur Constant-Force Tourbillon Watch

You don't need to understand the inner workings of the IWC Ingenieur Constant-Force Tourbillon Watch ($TBA) — but it doesn't hurt. It features a patented constant-force mechanism that guarantees extreme precision, as well as two barrels to supply the added torque necessary to drive the tourbillon. Other, more easily understood features include a 96-hour power reserve, a platinum and ceramic case, and a moon phase module that shows the moon phase for both the Northern and Southern hemispheres, as well as a countdown display showing the phases until the next full moon.

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