With the Cartier Rotonde de Cartier Earth Moon we have the fourth preview of Cartier models that will be showcased in January at the Salon International of Haute Horlogerie in Geneva.
The moon-phase function has a pretty unique implementation. In fact, the phase of the moon is shown on demand when the user presses the push-piece at two o'clock: the lapis lazuli stone disc - acting as the shadow on the moon - moves out from its position, under the IIII Roman numeral, to cover the tourbillon aperture in a way that represents the same phase of the moon in the sky. By pressing the push-piece again the stone disc is brought back to its original position.
The other push-piece is used to set the second time zone indicated by the 24-hour rotating disc at 12 o'clock.
The open worked and rhodium-coated Calibre 9440 MC - the result of the collaboration between Cartier R&D and the renowned duo Renaud & Papi - is visible through the back-case sapphire crystal. It offers three days of power reserve.
Only 50 examples of the Rotonde de Cartier Earth Moon will be created. The price is expected to exceed US$ 275,000.