SIHH 2011 Rotonde de Cartier Astroregulateur
- January 24th, 2011
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At the SIHH 2011, luxury icon Cartier revealed the incredible Rotonde de Cartier Astroregulateur to wide and immediate acclaim. It continues to impress its vision on the haute horlogerie landscape, this time with a technical breakthrough.

Rotonde de Cartier Astroregulateur watch had been previewed to select press late last year so its official debut had been highly anticipated. The 50mm diameter Cartier Rotonde de Cartier Astroregulateur is cased in a niobium-titanium alloy, allowing it to weigh in at an incredible 55g. This alloy is new to watch cases, having been used once in the Cartier Swiss Watches concept watch, the ID One. Getting straight to the point, the excitement is all about the escapement and the rotor, which are clearly visible in the picture.
Cartier’s watchmakers have mounted the entire escapement, including the second wheel, onto the rotor in an effort to one-up the tourbillon. There are no independent test results yet but, as far as technical watchmaking goes, Cartier’s in-house calibre 9800 MC is simply too cool for school.

It is also far too complicated to get into in one short story but, to break it down, the escapement oscillates at a consistent rate in all vertical positions because the winding rotor keeps its center of gravity in one place.
Intriguingly, not only is this the first watch to ever attempt such an ambitious arrangement for its rotor and escapement, it is likely to be the first to ever use the real estate of the rotor to display the seconds. Of course this is only possible because the balance (and second wheel) are mounted on the rotor.
This also reveals another innovation, a system of two differentials that regulate the kinetic forces acting on the rotor. Thus this system ensures that kinetic energy supplied to the rotor remains constant, no matter how vigorous the movements of the wearer.




