Longines HydroConquest HydroConquest 39 Automatic Stainless Steel - Pink Gold / Grey / Bracelet

Reference L3.780.3.78.6

About this watch

The Longines HydroConquest L3.780.3.78.6 is a stunning luxury watch that combines elegance with functionality. This automatic stainless steel model features a 39mm diameter, 12.20mm height, and ceramic, stainless steel materials for durability. With a water resistance rating of 300 meters, it's perfect for diving enthusiasts or casual wearers who appreciate a robust yet stylish watch. The sleek design boasts pink gold accents, a grey matte finish, and mixed indexes that provide unique visual appeal. The proprietary hands ensure optimal legibility, making it easy to tell the time in any environment. Additional features include a date function, rotating bezel with 0-60 scale, and adjustable clasp for customizable comfort.
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Key Features

  • Longines caliber L888.5 automatic movement
  • 300m water resistance rating
  • 39mm diameter stainless steel case
  • Ceramic and PVD gold coating for durability
  • Silicon balance spring for enhanced accuracy
  • 64-hour power reserve
  • Date function and rotating bezel with 0-60 scale

Specifications

Brand
Longines
Family
HydroConquest
Model
HydroConquest 39 Automatic Stainless Steel - Pink Gold / Grey / Bracelet
Reference
L3.780.3.78.6
Movement
l888-5
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Chronometer
Case
39mm
Dial Color
Grey
Crystal
Sapphire
Water Resistance
300

Current Listings

[WTS] Longines Hydroconquest Two Tone Ceramic Bezel Full Kit Mint on OEM Rubber & 2 Bespoke Straps

Longines Hydroconquest Two Tone Ceramic Bezel Full Kit Mint on OEM Rubber & 2 Bespoke Straps

Longines - L3.782.3.98.9 · $1,099
A two-tone Longines Hydroconquest with a sunburst blue dial, featuring a 41mm case and various strap options.

  • Condition: Mint
  • Case Size: 41mm
  • Dial Color: sunburst blue
  • Straps: 2 additional bespoke straps, 1 grey alligator leather, 1 blue babele calf leather
Posted at
Jan 2, 2026, 2:30 PM
Active
[WTS] Longines Hydroconquest L3.742.4 Automatic 41mm Diver $700 OBO

Longines Hydroconquest L3.742.4 Automatic 41mm Diver $700 OBO

Longines - L3.742.4 · $700
This Longines Hydroconquest L3.742.4 is a 41mm automatic diver's watch that keeps time well and runs smoothly.

  • Condition: Good overall, with minor scratches on the bezel and case
  • Case Size: 41mm diameter
  • Movement Type: automatic
Posted at
Dec 24, 2025, 11:07 AM
Active
[WTS] Longines Hydroconquest Two Tone Ceramic Bezel Full Kit Mint on OEM Rubber

Longines Hydroconquest Two Tone Ceramic Bezel Full Kit Mint on OEM Rubber

Longines - L3.782.3.98.9 · $1,099
This is a two-tone Longines Hydroconquest with a radiant sunburst blue dial, featuring a 41mm version of the watch that's more wearable than its 43mm counterpart.

  • Condition: Mint on OEM rubber strap
  • Model size: 41mm diameter
  • Case material: two tone
  • Bezel type: ceramic
Posted at
Dec 22, 2025, 10:59 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