1. Cartier
The masterpiece of Cartier's fine watchmaking collection this year combines a plethora of complications that the French maison took four years to develop: the Rotonde de Cartier Minute Repeater Mysterious Double Tourbillon. In an aperture at 10 o'clock, you witness the tourbillon making a delightful dance upon its own axis every 60 seconds, and around the aperture every five minutes—it is a performance that has long intrigued collectors, its secret lying in a sapphire disk that gives it the impression of floating in thin air. You might remember that the double tourbillon mysterious first appeared in 2013; you’ll notice that the aperture has been reduced in dimension so as to accommodate the minute repeater function, allowing the case to remain the same size, 45mm. The titanium frame ensures that the minute repeater’s chimes ring loud and clear, while its resonance is elevated thanks to several Cartier elements, including the use of square gongs and re-engineered hammers.