The Rotonde de Cartier Earth and Moon watch is the fruit of a technical and creative ambition that for Cartier consists of bringing together two complications in a daring display. A tourbillon has been incorporated into a moon phase complication, each depending on the other.
An innovative blend of complications
The moon-phase mechanism of the Rotonde de Cartier Earth and Moon watch is founded on a creative and complex design that combines a tourbillon, moon phase on demand and a second time zone.
Because it appears in its original form and exists only when its user wishes it to, the moon phase on the Rotonde de Cartier Earth and Moon watch reveals a technical creativity that is doubly innovative.
By pressing the push-button situated at four o'clock on the side of the case, a panel goes down and partially obscures the Tourbillon carriage. The crescent thus formed reproduces exactly the moon's shape in the sky.
The second time zone of the Rotonde de Cartier Earth and Moon watch is indicated by a 24-hour disc that was entirely redeveloped by for the calibre 9440 MC due to the sophistication of its disc display.
Exceptional finishes in an ode to craftsmanship and creativity
Polished lapis lazuli is used for the dial and the moon panel on the Rotonde de Cartier Earth and Moon watch. The hours and the second time zone are surrounded by a polished grid in 18-carat white gold. A three-dimensional dial is one of the signature features of the Cartier Fine Watchmaking collection, alongside Roman numerals that are openworked and chamfered by the hand of a master decorator in a manner akin to a skeleton movement.
The exceptional finishes of the 9440 MC are all the more remarkable because the semi-skeletonised bridges on the back of the movement are structured in a star shape, echoing this precious timepiece's lunar and terrestrial character on the case back.
With the the Rotonde de Cartier Earth and Moon watch, the Maison Cartier has created a timepiece that displays an exceptional level of creativity and craftsmanship.
Edition limited to 50 numbered pieces.
