Longines Hydroconquest 39mm

39mm stainless steel case. Date, self-winding mechanical movement beating at 25'200 vibrations per hour, with a monocrystalline silicon balance-spring power reserve up to 72 hours. Screw-in crown unidirectional rotating bezel, water-resistant to 30 bar, scratch-resistant sapphire crystal, with several layers of anti-reflective coating on both sides. Blue lacquered polished dial, swiss super-luminova®. Stainless steel bracelet, with double security folding clasp with micro adjustment system.