The Rolex 16613 is a reference number for a specific model of Rolex Submariner watch. It is a two-tone model, featuring a stainless steel case and bracelet with 18k yellow gold accents. The dial is blue and has luminous hour markers and hands for easy visibility in low light conditions. The watch also has a unidirectional rotating bezel with a blue insert, which can be used to track elapsed time.The Rolex 16613 is powered by a self-winding mechanical movement and has a power reserve of approximately 48 hours. It is water-resistant up to 300 meters (1000 feet), making it suitable for diving and other water activities.Overall, the Rolex 16613 is a highly sought-after and iconic luxury watch that combines both style and function. It is a popular choice among collectors and enthusiasts, and has a reputation for being a durable and reliable timepiece.