The Master Tourbillon combines the tourbillon mechanism with the two time zones. This allows for time setting on the main display without losing track of the precise minute and second setting all whilst conserving the reference time on the dial situated at 12 o'clock. This function is particularly useful when travelling, for example. One can set the new local time on the main dial whilst still conserving the time in your country of origin on the secondary display, the small dial at 12 o'clock. In addition to its complicated and advanced movement that offers a power reserve of 48 hours, the present watch is incredibly attractive, showcasing an elegant diamond-set bezel and crown set against a well preserved 18k gold case.