Longines HydroConquest HydroConquest 44 Quartz Stainless steel / Black / Bracelet

Reference L3.840.4.56.6

About this watch

The Longines HydroConquest L3.840.4.56.6 is a remarkable watch that embodies the spirit of adventure while maintaining classic elegance. Its robust 44mm round case exudes power and reliability, featuring a black dial with luminous hands and mixed indexes for excellent readability in any environment. Crafted from durable stainless steel, this timepiece boasts a brushed finish with polished accents, adding an understated touch of sophistication. The sturdy stainless steel bracelet accommodates a secure fit on the wrist, perfect for aquatic adventures or casual outings. At its core lies the reliable Longines caliber L157 quartz movement, offering accuracy and longevity with a power reserve of 26,280 seconds. This watch is built to withstand pressure, featuring an impressive water resistance of 300 meters and a rotating bezel with a 0-60 scale for tracking elapsed time underwater.
Buy Now on Jomashop
This is an affiliate link

Key Features

  • 44mm round stainless steel case
  • Black dial with luminous hands and mixed indexes
  • Longines caliber L157 quartz movement
  • 300m water resistance
  • Rotating bezel with 0-60 scale
  • Sapphire glass
  • Stainless steel bracelet

Specifications

Brand
Longines
Family
HydroConquest
Model
HydroConquest 44 Quartz Stainless steel / Black / Bracelet
Reference
L3.840.4.56.6
Movement
l157
Movement Features
  • Hours, Seconds, Minutes
  • Date
Case
Stainless Steel 44mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
300

Current Listings

[WTS] Longines Hydroconquest 43mm Full Black Ceramic Ref L3.784.4.56.9 MINT Full Kit $2500

Longines Hydroconquest 43mm Full Black Ceramic Ref L3.784.4.56.9 MINT Full Kit $2500

Longines - L3.784.4.56.9 · $2,500
This Longines HydroConquest features a unique full black ceramic aesthetic with a sleek and stealthy design, while maintaining refined and versatile qualities. The watch boasts excellent scratch resistance, legible dial, and comfortable daily wear.

  • Condition: MINT
  • Case diameter: 43mm
  • Thickness: 13mm
  • Lug-to-lug length: 56mm
Posted at
Apr 10, 2026, 8:26 PM
Active
[WTS] Longines Hydroconquest GMT | 41mm | Sunburst Brown | Excellent Condition

Longines Hydroconquest GMT | 41mm | Sunburst Brown | Excellent Condition

This Longines Hydroconquest GMT is a refresh of the well-loved hydroconquest line range, featuring a new quick-adjust bracelet and updated bezel with brown ceramic insert. The sunray dial looks incredible in all lighting conditions, especially when exposed to sunlight.

  • Condition: Excellent
  • Case size: 41mm diameter
  • Lug to lug: 49.2mm
  • Thickness: 12.8mm
Posted at
Apr 8, 2026, 5:34 PM
Active
[WTS] Longines Hydroconquest GMT 41mm

Longines Hydroconquest GMT 41mm

Beautiful Longines Hydroconquest GMT with a 41mm case, included in the sale are extra links, warranty card, and original packaging.

  • Condition: very good condition
  • Water Resistance: not specified
  • Warranty Years: 2
Posted at
Apr 2, 2026, 5:00 PM
Active
[WTS] Longines Hydroconquest Green Dial Black Bezel

Longines Hydroconquest Green Dial Black Bezel

Longines - Hydroconquest · $1,250
  • Condition: Perfect
  • Year Of Purchase: August 2025
  • Crown And Buckle Straps: 2 additional
  • Shipping Info: US only
Posted at
Apr 1, 2026, 9:51 AM
Active
[WTS] Longines Hydroconquest GMT - 41mm - Sunray Brown - Box and Papers - Excellent Condition

Longines Hydroconquest GMT - 41mm - Sunray Brown - Box and Papers - Excellent Condition

The Longines Hydroconquest GMT features a 41mm stainless steel case, a true GMT movement, and a brown sunray dial with a brown ceramic bezel insert. It has a quick-adjust bracelet and a sapphire crystal with anti-reflective coating.

  • Condition: Excellent, some minor hairline scratches on the bracelet
  • Case size: 41mm
  • Lug width: 21mm
  • Thickness: 12.8mm
Posted at
Mar 31, 2026, 1:25 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