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Quick TakeThe Sinn 857 UTC isn't just a watch; it's a wrist-mounted command center ready for any global adventure. Its bead-blasted, TEGIMENT-hardened steel case exudes pure, no-nonsense functionality, like a finely tuned instrument. The clearly marked 24-hour hand, partnered with the robust, bi-directional pilot's bezel, means keeping track of time across zones is effortless. The Ar-Dehumidifying Technology whispers of expeditions in extreme environments, and that Magnetic Field Protection? Complete assurance against the invisible forces that can disrupt lesser timepieces. This is not a fashion statement piece; the matte black dial and luminous markings all point to clarity and precision. The 857 UTC a tool, engineered for those who demand unwavering performance and reliability, wherever their journey takes them. A testament to Sinn's dedication to creating the finest time-telling tools that can take anything that you throw at it.
DescriptionThe Sinn 857 UTC, reference 857.010, is a purpose-built instrument watch designed for professional use. Its construction centers around a bead-blasted stainless steel case measuring 43mm in diameter and 12mm in thickness. The case is further enhanced with Sinn's TEGIMENT Technology, a surface-hardening process that significantly increases scratch resistance. This process differentiates this model, contributing to the watch’s overall durability. The band lug width for the integration of straps measures 22mm, while the watch weighs 90 grams without a strap. The case back is screw-fastened and manufactured without nickel, catering to users with sensitivities.
The 857 UTC incorporates several key Sinn technologies for enhanced reliability. Firstly there is the Ar-Dehumidifying Technology, designed to minimize moisture ingress and prevent fogging of the crystal. Secondly, it features integrated Magnetic Field Protection, shielding the movement from magnetic fields up to 100mT (equivalent to 80,000 A/m). A bi-directional pilot's bezel, also constructed from TEGIMENT-hardened steel, offers minute ratcheting and includes a luminous key mark for visibility in low-light conditions. This bezel is secured using a captive design, preventing accidental detachment. Legibility is enhanced by a matte black dial with indices and numerals coated in luminescent material, along with similarly treated hour and minute hands. Inside, the watch uses a SW330-1 self-winding movement, featuring 25 bearing jewels and operating at a frequency of 28,800 semi-oscillations per hour. This movement has a seconds stop function for precise time setting, and is itself anti-magnetic, as defined by DIN 8309 Standards. The watch is water and pressure-resistant to 20 bar, as defined by DIN 8310 and also low-pressure resistant. Functionality is comprised of: standard hours, minutes, and seconds display; a date display; and a second time zone displayed on a 24-hour scale. The crystal is sapphire, with an anti-reflective coating applied to both sides.