Longines HydroConquest L3.740.4.56.6 41 mm Black Dial Quartz Watch

HydroConquest 41 mm dive watch

The Longines HydroConquest L3.740.4.56.6 is a 41 mm stainless steel quartz watch built for water sports and daily wear. Its Swiss quartz movement powers analog hands and a date window at three o'clock. The watch is water-resistant to 300 metres or 1000 feet, making it suitable for serious diving. It is designed for adult men who want a luxury sports timepiece.

Sapphire crystal and ceramic bezel

A scratch-resistant sapphire crystal protects the sunray black dial with luminescent snowflake hands and applied indices. The uni-directional rotating bezel carries a black ceramic top ring for dive timing. A screw-down crown guards the movement, while the solid caseback bears the Longines winged hourglass logo. The 21 mm stainless steel bracelet fastens with a double safety folding clasp and push-piece mechanism.

Check strap fit and clasp operation

Verify that a 21 mm lug width matches any alternative strap you may wish to use. Ensure the double safety folding clasp operates smoothly on your wrist size. Confirm the 11.90 mm case thickness sits comfortably under shirt cuffs. The screw-down crown must be fully tightened before any water exposure to maintain the rated resistance.