Santos de W2020019 replica

To avoid the limitations of starting the watch, the Cartier movement design team has developed a reliable, efficient, and durable mechanism for the Rotonde de Cartier Annual Calendar, which automatically adjusts the date at the end of the month (30 and 31 days of the month management) and displays the day, month, and year simultaneously, without any adjustment, except for the manual intervention required when transitioning from February 28 or February 29 to March 1. Cartier’s new calibre 9908 MC features a mechanism that allows all the annual calendar information (day, date, and month) to be adjusted through the winding crown. This adjustment setup is simple, with no adjuster on the case, creating an ideal and convenient mode for everyday use.

Cartier chose the 1904MC calibre for the Rotonde de Cartier Annual Calendar, which was integrated directly into the mainplate. After much research, the watch features a large date window at 12 o’clock that shows two digits independently, and a winding crown that allows quick adjustment of the different settings of the annual calendar. Unique, simple, and straightforward, this in-house developed movement has several important features, including a large, independent two-digit date display with a semi-instantaneous mechanism (one-hour jump), which ensures the reliable timekeeping expected of high-end watches.

In this design, a pinwheel on a large single-digit display disc rotates a star-shaped wheel with ten digits. The single-digit disc, the true centerpiece of the calendar system, holds another secret – a simple and clever mechanism that, in combination with a month memory cam mounted on a thin outer wheel with a single-digit date, can show 30 or 31 days with clear accuracy once the month has been adjusted. The device is unmatched in efficiency and is designed to calculate the length of odd-numbered and even-numbered months (except February, when 28 days become 29 days every four years), without losing accuracy, even when subjected to heavy vibrations. Cartier’s designers have linked the date display to the day and month hand displays, streamlining the functionality of this automatic annual calendar and rigorously testing it to handle everyday shocks.