Hydrium Grey Reef Shark Limited to 200 pieces. The Grey Reef Shark has an almost architectural quality to it: cold grey, precise and powerful without excess. Found around tropical coral reefs, particularly along drop-offs and areas of strong current, it is an important predator within these complex ecosystems. Research has also shown that grey reef sharks can transport nutrients from offshore waters back towards nutrient-poor reefs as they move between feeding and resting areas. This environment, and the animal’s understated presence within it, became the inspiration for the Hydrium Grey Reef Shark. The cold grey dial has a deliberately brutalist character, stripped back to the elements that define a Hydrium: the traditional Isotope Lacrima on the dial, our distinctive hands and the essential information required to read the time. Rather than illustrating the shark or relying on the usual visual clichés associated with it, we wanted its character to come through in the colour, texture and purpose of the watch itself. Super-LumiNova on the hands and diving bezel provides visibility in low light, while 300 metres of water resistance reflects the diving origins of the Hydrium collection. The Grey Reef Shark also introduces, for the first time, the Hydrium Bracelet, made from solid bead-blasted stainless-steel links and fitted with quick-release spring bars and a diver’s clasp with extension. The watch is also supplied with a grey FKM strap, allowing two very different interpretations of the same design. Inside is the Swiss Landeron 24 automatic movement, chosen for a watch designed to be worn and used rather than treated as an object of decoration. Our fascination with sharks has always been about the animals themselves and the extraordinary environments they inhabit. The Grey Reef Shark is deeply connected to the reef ecosystem, yet the species is today classified as Endangered on the IUCN Red List. The Hydrium Grey Reef Shark is our tribute to that remarkable animal, expressed not through imagery, but through the restrained colours, materials and functional character of the watch. Technical Specifications • Case: Microblasted 316L stainless steel • Diameter: 40mm × 48mm (including lugs) • Height: 12.9mm (14.9mm including double-domed sapphire crystal) • Caseback: Hydrium® screw-down exhibition caseback • Bezel: Unidirectional stainless steel, 120-click, with Super-LumiNova® pip at 12 o’clock • Crystal: Double-domed sapphire with anti-reflective coating • Crown: Screw-down crown at 3 o’clock • Dial: Cold grey with raised central Lacrima motif and raised chapter ring painted with Super-LumiNova® • Hands: Black Isotope hands filled with Super-LumiNova® • Water resistance: 300m / 30 ATM / 1,000 ft • Strap: 22/20mm quick-release grey FKM with Isotope-branded bead-blasted stainless steel buckle • Bracelet: 22/18mm quick-release Hydrium bracelet in bead-blasted stainless steel, with solid screw-fixed links and bead-blasted diver’s clasp with micro-adjustment Swiss Landeron Mechanical Movement • Automatic, self-winding • Power reserve 40 hours • 25 Jewels, 28800A/h • Accuracy -12/+12 s/day • Customised finishing with blued screws, Perlage and Côtes de Genève