Amazing selection of refurbished Pre-Owned Rolex Watches. All Rolex wathces come with the 1 year Ace Watch Warranty. Quality and Precision: Rolex watches are known for their accuracy, often certified as chronometers by the Swiss Official Chronometer Testing Institute (COSC). Materials: Use of high-quality materials like 904L stainless steel (known for better corrosion resistance than standard 316L), 18-carat gold, and platinum Movement: Most Rolex watches are equipped with in-house, automatic mechanical movements, showcasing innovations like the Parachrom hairspring for anti-magnetism and the Perpetual rotor for self-winding.