Tudor Master Chronometer

Tudor Black Bay Ceramic, 41mm matt black ceramic case with micro-blasted finish and monobloc middle case open case back in black-PVD-treated 316L steel with sapphire crystal, black, domed, unidirectional rotatable bezel in black-PVD-treated 316L steel with 60-minute graduated disc in black ceramic with sunray satin finish and engraved markings and numerals, manufacture calibre MT5602-1U self-winding mechanical movement with bidirectional rotor system, hybrid leather and rubber strap with 316L steel folding clasp and safety catch in black PVD-treated 316L steel, domed sapphire crystal, waterproof to 200m (660 ft)

Smooth functioning when exposed to a magnetic field of 15,000 gauss and precision following exposure.