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The Sinn 857 UTC TESTAF pilot's watch is encased in 43mm of stainless steel surrounding a black dial on a black leather strap. This pilot's watch is a legitimate rival to pilot watches including the Rolex GMT Master II, the IWC Pilot's Watch Mark XVIII, and the Omega Speedmaster Professional Moonwatch. All of Sinn Spezialuhren's proprietary technologies are including: Tegiment stainless steel for scratch resistance; AR dehumidifying copper sulfate capsule and nitrogen fill; captive bezel technology for security against blows; security against low pressure cockpit conditions; resistance to extremes of temperature; TESTAF pilot's watch certification from the University of Aachen. A proper GMT watch with a second time zone in 24-hour format, this Sinn 857 boasts a chronometer-grade ETA 2893-2 automatic mechanical caliber. 200-meter water resistance ensures that this Sinn pilot's watch is equally at home above or below open water. Functions include hours, minutes, seconds, date, and GMT. The watch also measures 12mm in thickness and 49.2mm from lug-to-lug.
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