Panerai, Submariner series, model: PAM00615, 47mm automatic mechanical, titanium case, unidirectional rotating bezel, chronograph function, complete set, extended warranty professional diving and flyback chronograph function As a watch in the Submariner series, it is water-resistant to 300 meters and features a unidirectional rotating diving bezel. It is also equipped with a flyback timing function. The blue central counter hour hand can quickly reset to zero and restart, making the timing operation more convenient. It is a practical configuration for diving and sports scenarios. Titanium alloy material is lighter and more resistant to allergies than traditional stainless steel. When worn, the pressure on large-diameter watches is significantly reduced. At the same time, it is hard and corrosion-resistant, balancing durability and wearing comfort. The P.9100 movement independently developed by Panerai features a dual mainspring barrel design, offers a 72-hour power reserve, and has a stable and reliable structure. It is one of the main movements for the brand's mid-to-high-end watches.