January 2020


A Peek Into the Annual Calendar System Inside the Rolex Sky-Dweller

The Rolex Sky-Dweller was the first new timepiece from the Swiss brand in twenty years featuring an innovative annual calendar with dual time zones. This distinctive technological masterpiece offers the information global travelers need for keeping track of time at a glance. The Rolex Sky Dweller is a beautiful watch that features a revolutionary design.

The annual calendar inside the Sky-Dweller is based on the SAROS mechanism. The traditional Rolex date calendar system is added with two gear ratios and four gear wheels to make for a full annual calendar. The annual calendar mechanism is designed around a fixed planetary gear wheel at the movement’s center.

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