The Longines HydroConquest L3.779.4.56.6 is a 39mm stainless steel automatic watch featuring a black lacquered polished dial. It is powered by the Longines L888 self-winding mechanical movement, operating at 25,200 vibrations per hour and offering a power reserve of approximately 72 hours. The watch includes a date function and is water-resistant up to 300 meters. Additional features comprise a unidirectional rotating ceramic bezel, screw-in crown, and a scratch-resistant sapphire crystal with anti-reflective coating on both sides. The stainless steel bracelet is equipped with a double security folding clasp and micro-adjustment system. Reference number: L3.779.4.56.6.