Longines HydroConquest Hydroconquest Chronograph

Reference L3.644.4.56.6

About this watch

The Longines Hydroconquest Chronograph L3.644.4.56.6 is a stunning combination of style, functionality, and reliability. With its robust build, it promises durability while ensuring that you look good whether you’re at the beach or in a boardroom meeting. The case is made from high-quality stainless steel, creating a balanced presence on the wrist. The black dial features mixed indexes providing a sporty vibe while ensuring easy readability. The chronograph sub-dials are well-placed, making it simple to track time in various ways. At the core of this watch is the renowned ETA caliber 7750 automatic movement, celebrated for its reliability and precision. The sapphire glass ensures that the watch remains clear and legible no matter the conditions you put it through. With a water resistance rating of 300 meters, the Hydroconquest Chronograph is more than just a pretty face; it's a true diving companion.
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Key Features

  • 41mm diameter stainless steel case
  • Sapphire glass for scratch resistance
  • Renowned ETA caliber 7750 automatic movement
  • Chronograph feature with easy-to-read sub-dials
  • Water resistance of up to 300 meters
  • Robust and durable design
  • Proprietary hands for a unique touch

Specifications

Brand
Longines
Family
HydroConquest
Model
Hydroconquest Chronograph
Reference
L3.644.4.56.6
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] Longines Hydroconquest GMT, Ref: L3.790.4.96.6, 41mm

Longines Hydroconquest GMT, Ref: L3.790.4.96.6, 41mm

Longines - L3.790.4.96.6 · $1,825
The Longines Hydroconquest GMT features a stainless steel case with blue ceramic bezel and a blue dial.

  • Condition: preowned with minor desk rash on bracelet
  • Case size: 41mm diameter
  • Bezel material: blue ceramic
  • Bracelet material: stainless steel
Posted at
Nov 30, 2025, 4:59 PM
Active
[WTS] Longines HydroConquest Automatic 43mm Date l3.782.4.96.6

Longines HydroConquest Automatic 43mm Date l3.782.4.96.6

Longines - L37824-966 · $960
A Longines HydroConquest 43mm Automatic in blue with ceramic, unidirectional rotating bezel, a solid stainless steel case, and water resistance up to 300 meters.

  • Condition: Excellent, used maybe 5 times since new
  • Case size: 43mm diameter
  • Depth rating: 300m
Posted at
Nov 30, 2025, 12:17 PM
Active
[WTS] Longines Hydroconquest 41mm Sunray Grey Ref L3.782.4.76.6 Full Kit plus extra strap $950

Longines Hydroconquest 41mm Sunray Grey Ref L3.782.4.76.6 Full Kit plus extra strap $950

The Longines HydroConquest features a stunning sunray grey dial that shifts beautifully under light, giving it a sleek, modern look that works equally well dressed up or down. The watch wears comfortably at 41mm and the proportions make it a great everyday piece that still feels special on the wrist.

  • Condition: Great shape overall, with only light surface wear on the case and bracelet
  • Case size: 41mm diameter
  • Lug to lug length: 51mm
  • Thickness: 11.9mm
Posted at
Nov 29, 2025, 11:32 AM
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