Ulysse Nardin Marine Chronometer The Ulysse Nardin Marine Chronometer is an example of outstanding water resistance. For 20 years, it has been faithfully serving divers and water rats who need a sense of time even beneath the land masses. To a depth of 200 metres, the well-designed watch model withstands all the demands of the turbulent sea. Punched from a stainless steel alloy, the case is one of the frontrunners in terms of lightness and stability. With a power reserve of 60 hours, the watch becomes an endurance runner. It accompanies the wearer steadfastly through numerous stages of life - not least thanks to the specially created alloy of silicon and diamond, which reduces the friction inside the chronometer to a minimum. The extra-long second hand, on the masterpiece of underwater watches, turns from an anomaly to a fine but exquisite detail. The COSC certificate underlines the excellent quality and completes the profile of the brand watch cleanly.