Harry Winston Ocean Diver is both a high-precision diver’s tool and a work of art. The 44mm case is made of Harry Winston’s proprietary Zalium, which is light, strong and non-corrosive. The bezel, in either 18k white or rose gold, rotates beneath twin Zalium arches, which function as guards for the crown. The unidirectional rotating bezel can be used for timing decompression stops, while the luminous markers and hands offer perfect under-water visibility. The self-winding, three-register chronograph, with a frequency of 28,800vph and power-reserve of 42 hours, is capable of timing intervals of up to twelve hours and is water-resistant to 200m. Harry Winston’s signature ‘Shuriken’ power indicator animates the dial and lets the user know at a glance that the watch is running properly.