Longines HydroConquest Hydroconquest Quartz 39 Blue

Reference L3.688.4.03.6

About this watch

The Longines HydroConquest L3.688.4.03.6 is a statement piece that embodies the spirit of adventure, precision, and luxury. This timepiece is not just another watch; it's a reflection of your lifestyle, blending classic elegance with modern features. The reliable quartz movement ensures precision and reliability, while the robust stainless steel construction enhances durability. With its stunning blue dial, versatile design, and trusted brand heritage, this watch caters to a wide array of tastes and needs. Whether you're dressing up for a formal event or going casual for a weekend outing, the HydroConquest fits seamlessly into any wardrobe. The vibrant blue color adds a pop of personality, while the stainless steel body ensures it pairs well with both casual and formal attire.
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Key Features

  • Quartz movement (Longines caliber L263)
  • Stainless steel construction
  • 30 meters water resistance
  • Sapphire glass
  • Rotating bezel for elapsed time tracking
  • Blue dial with Arabic numerals
  • 39 mm diameter and 19 mm lug width

Specifications

Brand
Longines
Family
HydroConquest
Model
Hydroconquest Quartz 39 Blue
Reference
L3.688.4.03.6
Movement
l263
Movement Features
  • Hours, Minutes, Seconds
  • Date
Case
Stainless Steel 39mm
Dial Color
Blue
Crystal
Sapphire
Water Resistance
30

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