Longines HydroConquest HydroConquest 39 Automatic Stainless Steel / Black / Bracelet

Reference L3.780.4.56.6

About this watch

The Longines HydroConquest 39 Automatic is a masterful blend of style, precision, and durability. This luxury watch boasts a striking black dial with a matte finish, adding a sophisticated touch to its sporty design. The rotating bezel with a bold 0-60 dive scale gives it an edgy feel, perfect for both formal and casual settings. Built from stainless steel and ceramic, this watch is designed to withstand the rigors of underwater adventures and daily wear alike. Its robust construction ensures that your HydroConquest stays pristine even after years of use. With a diameter of 39.00 mm and a height of 12.20 mm, it's a comfortable fit for most wrist sizes. The Longines caliber L888.5 automatic movement provides accuracy and reliability, boasting chronometer certification and a power reserve of 64 hours. This means you'll always be on time, making every second count. With features like date display, water resistance up to 300 meters, and a rotating bezel for tracking elapsed time underwater, this watch is designed for functionality and safety. Whether you're diving deep or just enjoying a casual day, the HydroConquest will keep you looking sharp and feeling confident.
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Key Features

  • Automatic movement with chronometer certification
  • Water resistance up to 300 meters
  • Rotating bezel for tracking elapsed time underwater
  • Date display for easy timekeeping
  • Stainless steel and ceramic construction for durability
  • Chronograph functionality for precise time measurement

Specifications

Brand
Longines
Family
HydroConquest
Model
HydroConquest 39 Automatic Stainless Steel / Black / Bracelet
Reference
L3.780.4.56.6
Movement
l888-5
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Chronometer
Case
39mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
300

Current Listings

[WTS] Longines Hydroconquest 43mm (updated pictures)

Longines Hydroconquest 43mm (updated pictures)

Longines - L3.782.4.56.6 · $1,260
This Longines Hydroconquest 43mm features a black dial on a stainless steel bracelet and has been worn only 4-6 times since its purchase. It comes with a full set, including the box, tags, warranty cards, and is still under Jomashop's 2-year warranty.

  • Condition: Fantastic, worn 4-6 times
  • Case size: 43mm
  • Lug to lug: 53mm
  • Thickness: 11.90mm
Posted at
May 9, 2026, 4:10 PM
Active
[WTS] (brand new) Longines HydroConquest 39mm - $1800 shipped

(brand new) Longines HydroConquest 39mm - $1800 shipped

Longines - HydroConquest · $1,800
This brand new Longines HydroConquest features a black dial, stainless steel case and bracelet, sapphire crystal with anti-reflective coating, and is powered by the L888.4 automatic movement.

  • Condition: Unworn
  • Case material: stainless steel
  • Bracelet material: stainless steel
  • Water resistance: 300m
Posted at
May 9, 2026, 1:11 PM
Active
Longines HydroConquest, L3.781.4.06.9, Steel Diver, Olive, Excellent Condition.

Longines HydroConquest, L3.781.4.06.9, Steel Diver, Olive, Excellent Condition.

Longines - L3.781.4.06.9 · $1,095
This Longines HydroConquest is a steel diver's watch with an olive green matte dial and a unidirectional rotating ceramic bezel. The stainless steel case measures 41mm in diameter and has a water resistance of up to 300 meters.

  • Condition: Excellent Condition
  • Case Diameter: 41mm
  • Thickness: 11.9mm
  • Bezel Type: Unidirectional rotating Green Ceramic
Posted at
Feb 5, 2025, 2:47 AM
Active