TUDOR Black Bay Fifty-Eight 18k | 39 mm case, satin finished, in 18k yellow gold. Open case back with sapphire crystal. Unidirectional rotatable bezel in 18k yellow gold with 60-minute graduated disc in matte green anodized aluminium and gold gilded markings and numerals. Domed dark brown alligator strap with 18k yellow gold buckle. Manufacture Caliber MT5400 (COSC), self-winding mechanical movement with bidirectional rotor system. Domed green dial. 18k yellow gold screw-down winding crown, with the TUDOR rose with circular satin-brushed 18k yellow gold winding crown tube. Domed sapphire crystal. Waterproof to 200 m (660 ft).

The name Black Bay Fifty-Eight 18K is, of course, a reference to the precious metal of its case, but also to 1958, the year in which the first TUDOR divers’ watch waterproof to 200 meters (660 ft), reference 7924 or “Big Crown”, was introduced. Ideal for slim wrists, people who like more compact watches, and vintage enthusiasts, the Black Bay Fifty-Eight 18K is also the first TUDOR divers’ watch to be made in 18k yellow gold and offered with an open case back. This is a first for both in a TUDOR divers’ watch.