Excalibur Quatuor (2013)
The Geneva-seal stamped Excalibur Quatuor shows off the fully integrated manufacture’s expertise in complications. It features a highfrequency 16Hz movement — the 590-part Calibre RD101 — that incorporates four sprung balances and five differentials to tackle the challenges presented by gravity. As one of only a few brands that can manufacture sprung balances in-house, Roger Dubuis chose to include four in the same movement in a world first. They work in pairs to instantly compensate for rate variations caused by changes in a watch’s position and add a completely original power reserve indicator. It was actually the brand’s double flying tourbillon with a differential introduced in 2005 that laid the foundations of the seven-year research programme required to produce the Excalibur Quatuor. Offered in a case made of silicon, this is available in a strictly limited edition of three pieces.
The world’s first silicon watch with four sprung balances
Price: CHF1 million