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 – Ceramic Bezel 39mm, 2029 Warranty

Longines HydroConquest – Ceramic Bezel 39mm, 2029 Warranty

A black dial Longines Hydroconquest Ceramic Bezel in 39mm size, bought new in October 2024.

  • Condition: Great condition on the case, crystal, and dial. Minor scratches from daily wear are visible on the bracelet and buckle.
  • Warranty Valid Until: October 2029
  • Size: 39mm
Posted at
Oct 16, 2025, 5:22 PM
Active
[WTS] Reduced! Longines Hydroconquest 41mm ceramic, LNIB literally spotless

Reduced! Longines Hydroconquest 41mm ceramic, LNIB literally spotless

This is a 41mm Longines Hydroconquest with a blue dial and blue ceramic bezel. It has not been worn extensively and comes with the original box and papers.

  • Condition: Like new in box
  • Diameter: 41mm
  • Bezel material: blue ceramic
Posted at
Oct 18, 2025, 8:33 AM
Active
[WTS] Longines Hydroconquest 41

Longines Hydroconquest 41

Longines - L3.781.4.05.6 · $1,380
The Longines Hydroconquest 41 features a black dial and green ceramic bezel, comes with full kit, box, papers, warranty, and original purchase receipt.

  • Condition: essentially unworn
  • Shipping: CONUS only
Posted at
Oct 15, 2025, 8:12 PM
Active
[WTS] BNIB Longines HydroConquest

BNIB Longines HydroConquest

The Longines HydroConquest is a stylish and functional dive watch designed for everyday wear. It features a stainless steel case with a sleek design and a water-resistant construction.

  • Condition: Brand new in box (BNIB)
Posted at
Oct 15, 2025, 7:10 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