18k gold-plated, holds China GTC testing agency certificate, QR code can be checked online! One watch and one code supports re-inspection. The Rolex Skywalker Sky-Dweller adopts the original 18k process and has internal welding heads. There are no raw links. The fluororubber-wrapped metal sheet can be interchanged with the original version. The buckle can be extended by 2.5cm. Adjustable, combined with one watch and three sections, it can be worn by people weighing 50kg to 150kg with ease! Parameters Equipped with JP modified 9002 movement, vibration frequency 21800 per hour, size 42m/14.3m, super luminous ice blue luminous material, 904L, functions moon phase, date, rotating annual calendar, dual time zone,