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The Longines HydroConquest L3.779.4.70.6 is a 39mm automatic dive watch in stainless steel with a ceramic bezel, a black lacquered dial and a steel bracelet. Its movement runs at 25,200 vph with a silicon balance-spring and up to 72 hours of power reserve, and it is rated to 30 bar with a screw-in crown and sapphire crystal. The 39mm case suits wrists that find the 41mm and 43mm HydroConquests too large, and it competes with dive watches such as the Tudor Black Bay 58 and Oris Aquis on specs rather than on badge. Owners of the HydroConquest line generally rate its build and finishing for the money, while some find the bracelet clasp bulky and the bezel action firm.
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HydroConquest owners praise the case finishing, legibility and the security of the 300m rating for the money. Common complaints are the chunky clasp and a bezel that takes effort to turn.
The Longines Hydroconquest L3.779.4.70.6 is an automatic watch with a 39 mm stainless steel case and a ceramic bezel. It has a black lacquered, polished dial with Swiss Super-LumiNova and a date display.
Its self-winding mechanical movement beats at 25,200 vibrations per hour. It uses a monocrystalline silicon balance spring and has a power reserve of up to 72 hours.
The crown screws in, and the bezel rotates in one direction only. The sapphire crystal is scratch-resistant and has several layers of anti-reflective coating on both sides. The watch is water-resistant to 30 bar. The stainless steel bracelet has a double security folding clasp with a micro adjustment system.
