It looks like with the new Cartier Rotonde de Cartier Astroregulateur limited edition watch, the Swiss watchmaker has found yet another, maybe even more effective, way of combating the problem of gravity affecting accuracy of mechanical watches. The solution is as simple as it is ingenious.
As you probably already know, the accuracy of a mechanical movement is constantly affected by chaotic motions of its owner’s hand and the gravity pull of Earth.
Around 216 years ago the Swiss watchmaking genius Abraham-Louis Breguet confronted the problem with his “tourbillon” system by putting the escapement and the balance into a rotating carriage that, theoretically, would have somewhat balanced out the negative effects of the force of attraction.
However, while truly spectacular and even mesmerizing, the tourbillon failed to significantly increase the accuracy of a mechanical movement and some time ago Cartier decided to attack the problem from another flank: by putting the escapement on to the oscillating weight in order to ensure that it will always stay upright.
To make the system work, Cartier’s engineers invested five years of their lives and applied for four patents describing a system that comprises “two differentials that change the speed transmitted by the wrist to the micro-rotor into a constant speed, thus ensuring the regular advance of the seconds indicator that moves with the rotor and, therefore, the good timing performance of the watch.”
Called Calibre 9800 MC, the new movement is really huge.
While its diameter is more or less average at 35.80 mm, the thickness of the movement is somewhat staggering at whole 10.10 millimeters. This is quite a height for a micro-rotor type of movement that usually shave a millimeter or two off the usual thickness of an automatic caliber with a “full-size” oscillating weight.
No wonder that the watch itself is presented in a larger than life 50 mm case.
To make the final product easier on a wrist, Cartier crafted the case in ultra-light niobium-titanium alloy that is often used in superconducting magnets. As a result, the weight of the chunky case was reduced to only 55 grams.
The French jeweler plans to produce the Cartier Rotonde de Cartier Astroregulateur automatic watch in a limited series of 50 individually numbered pieces. Together, they will probably cost like the International Space Station.
Cartier Rotonde de Cartier Astroregulateur automatic watch specification
Movement: Automatic, Caliber 9800 MC, micro-rotor, 281 components, 43 jewels, 35.80 mm in diameter, 10.10 mm in height, 21,600 vph, in-house, Swiss Made
Movement decoration: Cotes de Geneve stripes, circular-grained mainplate
Functions: Hours, minutes, seconds
Power reserve: 80 hours
Case material: Niobium-titanium
Bezel material: Niobium-titanium
Case shape: Round
Bezel shape: Round
Case size: 50.00 mm
Lug width: N/A
Case height: N/A
Dial: Galvanic guilloche, silvered openwork grill with sunburst effect
Numerals: Roman, black, transferred
Hands: Blued steel, sword-shaped
Water resistance: 30 meters
Strap: Black alligator skin with double adjustable folding clasp in 18-carat white gold
Case back: Sapphire