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Features include: scratch resistant sapphire crystal, screwdown crown, luminous hands & hour marks Tudor has a calibre 2892 self winding automatic movement and is up to 150m water resistant. Watch also features 42 hour power reserve. In great condition comes on a black leather strap. Tudor Grantour Chrono Fly-Back Model # 20550N 42mm Case Diameter Black DIal 42 Hours Power Reserve Self Winding Automatic Movement Tudor Calibre 2892 Scratch Resistant Sapphire Crystal 150 Meters Water Resistant Luminescent Hands & Hour Markers Screw Down Crown Deployment Buckle 100% Authentic Less