The Longines HydroConquest L37814569 is a 41 mm stainless steel dive watch fitted with a black ceramic unidirectional bezel and a sunray black dial. Applied Arabic numerals and indexes are filled with Swiss Super LumiNova, while the polished silvered hands give the dial a clear and functional appearance suited to underwater readability. Inside is the Longines Calibre L888, an automatic movement with a silicon balance spring, resistance to magnetic fields and a power reserve of 72 Hours. The watch uses a screw down crown and screw down case back to achieve a water resistance of 300 meters. The black rubber strap is fitted with a double safety folding clasp and dive extension, and the lug to lug length of 51.10 mm ensures a secure wrist presence.