Rolex GMT Master II 18K Yellow Gold Black Dial Mens Watch 16718 Box Papers. Officially certified chronometer self-winding movement. 18K yellow gold case 40.0 mm in diameter. Rolex logo on a crown. 18k yellow gold bidirectional rotating bezel with a special 24-hour black bezel insert. Scratch resistant sapphire crystal. Black dial with luminous hour markers and mercedes hands. Date window at 3 o'clock aperture. Custom blue leather strap with tang buckle.