The Longines Hydro Conquest ref: L3.781.3.78.7 features a 41mm stainless steel case with a grey ceramic bezel. This model, introduced in 2021, is powered by the Longines caliber L888.5, which offers automatic winding. It includes a date function and is certified as a chronometer, ensuring precision in timekeeping. The watch combines durability with a modern aesthetic, making it suitable for both aquatic and everyday environments.