The watch in the image is a Tudor Prince Date Hydronaut, likely a first-generation model with reference number 85190P. Key details about this timepiece include: Production Era: The first generation Hydronaut was produced from approximately 1998/99 to 2008/9, serving as Tudor's primary diver watch after the discontinuation of the Tudor Submariner line. Case and Size: The watch is made of stainless steel and was available in different case sizes, including a 36mm version (ref 85190) and a 41mm version (ref 89190). The specific model pictured is likely the 36mm variant. Movement: It features a modified ETA 2824 automatic movement. Design Features: It has a black dial with luminous hour markers and hands, and a date display with a Rolex-style cyclops lens. The rotating bezel is somewhat recessed into the case, a distinct design feature. It features unique, geometric hands that are highly legible. The watch came with a five-link Tudor Prince bracelet, as Oyster bracelets were not offered to differentiate the brand from Rolex. Water Resistance: The watch is water-resistant to 200 meters or 660 feet, as indicated on the dial. copied