Longines HydroConquest Hydroconquest Chronograph

Reference L3.644.4.56.2

About this watch

The Longines Hydroconquest Chronograph (Model L3.644.4.56.2) is a stunning piece that combines sophistication with robust functionality. Founded in 1832, Longines has a rich heritage in watchmaking that spans nearly two centuries. The Hydroconquest line is designed for those who appreciate both style and performance. This timepiece is powered by the revered ETA 7750 movement, an automatic movement providing reliable and accurate timekeeping experience with a frequency of 28,800 vibrations per hour and a power reserve of 42 hours. The watch features a gem-set bezel, stainless steel case with a water resistance of up to 300 meters, and a black dial with mixed indexes for high visibility. The proprietary hands are designed for readability, ensuring quick time-telling in low-light conditions. With its impressive water resistance and robust chronograph functionality, this watch is perfect for divers, snorkelers, and anyone who appreciates luxury and performance.
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Key Features

  • ETA 7750 automatic movement
  • Water resistance up to 300 meters
  • Gem-set bezel
  • Stainless steel case
  • Black dial with mixed indexes
  • Proprietary hands for readability
  • Robust chronograph functionality

Specifications

Brand
Longines
Family
HydroConquest
Model
Hydroconquest Chronograph
Reference
L3.644.4.56.2
Movement
7750
Movement Features
  • Hours, Minutes, Small Seconds
  • Date, Day
  • Chronograph
Case
Stainless Steel 41mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
300

Current Listings

[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 – 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] 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