Ref. 215.30.44.21.01.002, (21530442101002), men's watch, stainless steel, diameter 43.5 mm, height approx. 16 mm, water-resistant to 60 atm, sapphire crystal, screw-down case back, automatic, chronometer, Cal. 8900, hours, minutes, central seconds, date, helium escape valve, black with luminous hands and hour markers, stainless steel. Box and papers 07.2025. Omega Seamaster Planet Ocean 600M Master Chronometer 43.5 mm 215.30.44.21.01.002 refers to a watch from the Omega Seamaster collection. More specifically, it is the Omega Seamaster Diver 300M Co-Axial Master Chronometer 43.5 mm. This watch is a popular model from Omega and was developed specifically for divers. It is water-resistant to 300 meters, meeting the requirements of professional divers. The watch case is made of stainless steel and has a diameter of 43.5 mm, making it a robust and masculine watch. The bezel is unidirectional and features a ceramic insert to enable precise timekeeping underwater. The dial of the Omega Seamaster Diver 300M is black and equipped with large luminous indices and hands to ensure good readability even in low light conditions. There is also a date display at 3 o'clock. At the heart of this watch is the automatic Omega Co-Axial Master Chronometer caliber 8900, which has a power reserve of approximately 60 hours. It is a certified chronometer and offers high precision and anti-magnetic properties. The Omega Seamaster Diver 300M comes with a stainless steel bracelet equipped with a folding clasp. The bracelet can be easily adjusted to ensure optimal comfort. Overall, the Omega Seamaster Diver 300M Co-Axial Master Chronometer (reference number 215.30.44.21.01.002) is a high-quality diving watch that impresses in terms of both design and functionality. It is an ideal choice for divers and watch enthusiasts looking for a reliable and stylish watch.