Longines HydroConquest HydroConquest 39 Automatic Stainless Steel / Blue / Bracelet / Star Navigation

Reference L3.675.4.96.6

About this watch

The Longines HydroConquest 39 Automatic is a statement piece that effortlessly combines style with high performance. With its stainless steel construction and vibrant blue dial, this watch exudes sophistication and durability. The proprietary hands add a touch of uniqueness, while the rotating bezel allows for precise timing of underwater activities. At the heart of the HydroConquest 39 is the Longines Caliber L633.5, boasting precision and durability with a frequency of 28,800 vibrations per hour. The addition of a date function further enhances its practicality, and the impressive water resistance of 300 meters makes it suitable for professional diving, swimming, and other water sports. Comfort is key, and this watch does not disappoint, featuring a secure clasp that ensures a perfect fit. With its blend of style, durability, and precision, the HydroConquest 39 stands tall in the world of luxury watches.
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Key Features

  • Stunning blue dial with stick and dot indexes
  • Robust Longines Caliber L633.5 automatic movement
  • 300-meter water resistance for diving enthusiasts
  • Sapphire glass for scratch resistance and durability
  • Adjustable stainless steel bracelet for comfort and style

Specifications

Brand
Longines
Family
HydroConquest
Model
HydroConquest 39 Automatic Stainless Steel / Blue / Bracelet / Star Navigation
Reference
L3.675.4.96.6
Movement
l633-5
Movement Features
  • Hours, Minutes, Seconds
  • Date
Case
Stainless Steel 39mm
Dial Color
Blue
Crystal
Sapphire
Water Resistance
300

Current Listings

[WTS] Longines - HydroConquest

Longines - HydroConquest

Longines HydroConquest with ceramic bezel in excellent condition. Comes complete with both boxes, hangtags, manual, extra links, and a Joma card.

Posted at
Mar 2, 2026, 10:06 PM
Active
[WTS] Longines Hydroconquest Blue 39mm - $1150

Longines Hydroconquest Blue 39mm - $1150

Longines - Hydroconquest · $1,150
A blue dial Longines Hydroconquest 39mm watch with a full kit, in excellent condition and keeping good time.

  • Condition: Great condition
  • Year purchased: 2025
  • Warranty duration: 5 years
Posted at
Mar 1, 2026, 8:14 PM
Active
[WTS] Longines Hydroconquest 41mm Two Tone

Longines Hydroconquest 41mm Two Tone

A Longines Hydroconquest 41mm Two Tone watch with a black dial and two tone finish. It is in very good condition with some minor wear.

  • Condition: Very Good Pre Owned Condition
  • Diameter: 41mm
Posted at
Feb 27, 2026, 3:34 PM
Active
[WTS] Longines HydroConquest GMT 41mm L3.790.4

Longines HydroConquest GMT 41mm L3.790.4

Longines - L3.790.4 · $1,799
This Longines HydroConquest GMT is a 41mm watch featuring a 6.5 inch bracelet and an aftermarket rubber strap with deployant.

  • Bracelet Length: 6.5 inches
  • Case Size: 41mm
Posted at
Feb 19, 2026, 5:35 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