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Quick TakeThe Sinn 857 S is a serious tool watch, but with an undeniable cool factor. It's the kind of watch that whispers, "I'm ready for anything," without being overly flashy. That matte black dial, offset by the stark white indices and luminescent hands, exudes pure functionality. The TEGIMENT technology and black hard coating mean this thing can handle some serious wear, while the Ar-Dehumidifying Technology is like a secret weapon against the elements. The captive pilot's bezel isn't just a design flourish; it's a nod to aviation heritage, ready to time critical maneuvers or, you know, how long your pizza has been in the oven. And with 20 bar water resistance, it's more than capable of handling a deep dive or just the unexpected downpour. The 857 S is refined capability and, it's clear that its a tool for demanding environments, from a pilot cockpit to any everyday setting. It's the perfect companion for those who don't back down from a challenge.
DescriptionThe Sinn 857 S, reference 857.021, is engineered as a high-performance instrument watch. Its construction begins with a 43mm diameter case crafted from stainless steel, which undergoes a black hard coating process applied on a TEGIMENT Technology basis. This specialized treatment significantly enhances the steel's scratch resistance. The case thickness measures 12mm, contributing to the watch's robust profile, while maintaining a balanced form on the wrist. The watch features a band lug width of 22 mm, designed specifically to receive the integrated black silicone strap. Component weight, absent the strap, is documented at 90 grams. The screw-fastened case back is intentionally manufactured without TEGIMENT Technology and is nickel-free to improve compatibility for sensitive skin.
Powering the 857 S is the SW300-1 self-winding mechanical movement. This caliber incorporates 25 bearing jewels and operates at a frequency of 28,800 semi-oscillations per hour. A seconds stop function is integrated, allowing for precise time setting. The movement is shielded to resist magnetic fields up to 100mT (equivalent to 80,000 A/m), meeting the anti-magnetic standards defined by DIN 8309. The 857 S includes hours, minutes, and seconds hands, along with a date display. A critical element of the 857 S is its pilot's bezel, equipped with minute ratcheting. The bezel incorporates a luminous key mark for enhanced visibility and utilizes SINN's captive bezel technology to increase security. Further enhancing its functionality, the watch features Ar-Dehumidifying Technology. This design minimizes moisture ingress, boosting functional reliability and reducing fogging potential. The watch is pressure and water resistant to 20 bar and is resistant to low pressure conditions. DIN 8310 standards were met for water resistence. The dial, finished in matte black, showcases numbers and indices that are treated with a luminescent coating. The hour and minute hands also possess this luminescent material for improved readability in low-light conditions. The assembly is protected by a sapphire crystal, which receives an anti-reflective treatment on both surfaces.