Roger Dubuis Excalibur Quatuor

It’s a good thing Roger Dubuis makes its own hairsprings: its new Excalibur Quatuor, equipped with Caliber RD 101, requires a whopping four of them. The watch has four balances arranged concentrically around the movement and placed at an incline. They are intended to perform the same function as a tourbillon – eliminating timing errors caused by the effects of gravity on the balance – but to do it better. The four balances give the watch an amazingly high frequency of 16 Hz, or 115,200 vph. If that’s not enough, it’s also the first watch with a case made of silicon.

Source: watch time