TUDOR Black Bay Fifty-Eight 18k

39 mm yellow gold case, Brown alligator bracelet, 39 mm case, satin finished, in 18 ct yellow gold Open case back with sapphire crystal, Unidirectional rotatable bezel in 18 ct yellow gold with 60-minute graduated disc in matt green anodised aluminium and gold gilded markings and numerals, Manufacture Calibre MT5400 (COSC) Self-winding mechanical movement with bidirectional rotor system, Green, domed, 18 ct yellow gold screw-down winding crown, with the TUDOR rose in relief with circular satin-brushed 18 ct yellow gold winding crown tube, Domed sapphire crystal, Waterproof to 200 m (660 ft), Domed dark brown alligator strap with 18 ct yellow gold buckle.