Tudor is a Swiss-made watch brand, offering mechanical watches with sophisticated style and proven reliability. The origins of Tudor date back to 1926, when ‘The Tudor’ was first registered as a brand on behalf of Rolex founder, Hans Wilsdorf. Throughout their history, Tudor watches have been chosen by the boldest adventurers and seasoned professionals alike. The Black Bay line is the result of the subtle blend of traditional aesthetics and contemporary watchmaking. It brings together over 60 years of Tudor divers’ watches at the same time as being resolutely anchored in the present. Neo-vintage in conception, its manufacturing techniques, reliability, robustness and the quality of its finish are consistent with today’s more rigorous requirements. TUDOR is launching the Black Bay Ceramic model, an extraodinary watch and symbol of the brand's technical expertise, with a case in matt black ceramic, a Manufacturer Calibre and a Master Chronometer certification from Metas (certification by the Swiss Official Chronometer Testing Institute (COSC). Precision at two temperatures, in six different levels of power reserve: 100% and 33% Case 41 mm matt black ceramic case with micro-blasted finish and monobloc middle caseOpen case back in black-PVD-treated 316L steel with sapphire crystal Movement Manufacture Calibre MT5602-1U Self-winding mechanical movement with bidirectional rotor system Power Reserve Power reserve of approximately 70 hours Winding Crown Screw-down winding crown in black-PVD-treated 316L steel, with the TUDOR rose in relief and circular satin-brushed steel winding crown tube. Waterproofness Waterproof to 200 m (660 ft) in accordance with ISO standard 22810:2010 Bezel 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 Dial Black, domed Crystal Domed sapphire crystal Bracelet Hybrid leather and rubber strap with 316L steel folding clasp and safety catch in black PVD-treated 316L steel Precision Certification by the Swiss Official Chronometer Testing Institute (COSC) Precision at two temperatures, in six different positions and at two different levels of power reserve: 100% and 33% Anti-Magnetism Smooth functioning when exposed to a magnetic field of 15, 000 gauss and precision following exposure Complimentary black fabric strap with cream band and black PVD-treated 316L steel buckle, included in the box