39 mm case, satin finished, in 18 ct yellow gold Open case back with sapphire crystal. Manufacture Calibre MT5400 (COSC) Self-winding mechanical movement with bidirectional rotor system. Unidirectional rotatable bezel in 18 ct yellow gold with 60-minute graduated disc in matt green anodised aluminium and gold gilded markings and numerals. Green dial, 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