The Pilot's watches from the 857 UTC model series combine the core competencies of our watchmaking: They are consistently functionally designed, instrumental watches in the tradition of our navigation clocks. The range of services extends from Magnetic field protection up to 80,000 A / m over theAr-Dehumidifying Technology up to a pressure resistance of 20 bar . The pilot's bezel and the second time zone on a 24-hour basis make these watches the perfect instrument for all purposes. The aviator's bezel made of stainless steel , which can be rotated on both sides and locks in minute steps, is captively connected to the housing by a mechanism developed by us for this purpose