MIDO Ocean Star 600 Chronometer pairs robust dive performance with refined Swiss watchmaking. The Ocean Star 600 Chronometer is built for deep-water use and precision timekeeping. Key attributes: Blue | Grey | Stainless steel | Water resistant to 60 bar (600 m) | COSC-certified chronometer movement | Silicon balance spring | Power reserve up to 80 hours | Automatic winding movement | Helium escape valve | Rotating ceramic bezel | Date function | Folding clasp with diving extension | Screw-down crown | Blue dial with applied indexes | Ceramic bezel filled with Super‑LumiNova Grade X | Sapphire crystal with double-sided anti-reflection | Round case design | Dimensions & fit: Case diameter: 43.50 mm | Thickness: 14.6 mm | Lug width: 22 mm | Composition & care: Stainless steel | Ceramic bezel | Sapphire crystal | Rinse with fresh water after saltwater exposure. Avoid strong shocks and chemicals. Have the watch serviced regularly by an authorized service center.