The Longines HydroConquest L3.788.4.56.6 is a 42mm stainless steel automatic watch featuring a black lacquered polished dial and a unidirectional rotating ceramic bezel. It is powered by the Longines Calibre L888.5, offering a 72-hour power reserve and operating at 25,200 vibrations per hour. The watch includes a date function and is water-resistant up to 300 meters. Additional features comprise a screw-in crown, scratch-resistant sapphire crystal with anti-reflective coating, and a stainless steel bracelet with a double security folding clasp and micro-adjustment system. Reference number: L3.788.4.56.6.