Named after the year the first TUDOR dive watch was introduced, this Black Bay Fifty Eight watch boasts the same characteristic proportions of the 1950s model. The 39mm stainless steel case houses a reliable self-winding mechanical movement with bidirectional rotor system that ensures you never miss an appointment. Completing the look is a riveted stainless steel bracelet that secures comfortably with a folding buckle, safety closure.<br /><br /><strong>Case: </strong>39 mm steel case with polished and satin finish<br /><br /><strong>Movement: </strong>Manufacture Calibre MT5402 (COSC) - Self-winding mechanical movement with bidirectional rotor system<br /><br /><strong>Power Reserve: </strong>Power reserve of approximately 70 hours<br /><br /><strong>Winding Crown: </strong>Steel screw-down winding crown, with the TUDOR rose in relief, with circular satin-brushed steel winding crown tube<br /><br /><strong>Waterproofness: </strong>Waterproof to 200 m (660 ft)<br /><br /><strong>Bezel: </strong>Unidirectional rotatable bezel in steel with 60-minute graduated disc in matte blue anodized aluminum and silver gilded markings and numerals<br /><br /><strong>Dial: </strong>Blue, domed<br /><br /><strong>Crystal: </strong>Domed sapphire crystal<br /><br /><strong>Bracelet: </strong>Riveted steel bracelet with polished and satin finish, with folding clasp and safety catch<br /><br /><strong>TUDOR's Guarantee: </strong>Five-year transferable guarantee with no registration or periodic maintenance checks required<br /><br />TUDOR Style #: M79030B-0001