Detailed features & specificationsUNICOBy developing its own automatic chronograph movement, Hublot wanted it to be a?? like all of its creations a?? the first, different and unique. As the soul of the watch, this movement with an a??open hearta?? reveals its completely re-imagined design, with double coupling system and column-wheel from the dial side as well as a 72-hour power reserve. Its construction of 354 components has been simplified as much as possible to improve reliability and robustness.SAPPHIREIn search of the perfect fusion between movement and case, Hublot engineers and chemists have researched and developed a transparent material which reveals the heart of the watch, all while being robust enough to effectively protect the mechanism. Thata??s how the Manufacture has become the expert of synthetic sapphire, a material from which it derives its aesthetic qualities that are unique within watchmaking a?? transforming each watch into a work of art.??Technical DetailsSIZE: 42 mmCASE: Polished Sapphire CrystalBEZEL: Polished Sapphire CrystalWATER RESISTANCE: 50m or 5 ATMCRYSTAL: Sapphire with Anti-reflective TreatmentDIAL: Sapphire Crystal DialMOVEMENT: HUB1280 UNICO Manufacture Self-winding Chronograph Flyback Movement with Column WheelPOWER RESERVE: 72 HoursSTRAP: Transparent Structured Lined StrapsCLASP: Titanium Deployant Buckle Clasp