Longines HydroConquest Hydroconquest Quartz 39 Two Tone Blue

Reference L3.640.3.96.7

About this watch

The Longines Hydroconquest Quartz 39 Two Tone Blue is a stunning timepiece that combines Swiss craftsmanship with a chic design, making it a worthy addition to any watch enthusiast's collection. This robust watch features a rotating bezel for tracking elapsed time underwater and a stainless steel case with PVD gold coating creating a polished yet durable exterior. The blue dial exudes a sense of calm, reminiscent of the ocean's depths, while the PVD gold accents add a touch of luxury, creating a beautiful contrast. At the heart of this watch is the reliable Longines caliber L263 quartz movement, ensuring accurate timekeeping and low maintenance requirements.

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Key Features

Longines Caliber L263 Quartz Movement
Sapphire Crystal Glass for Enhanced Durability
300m Water Resistance for Diving and Swimming
Rotating 0-60 Dive Bezel for Tracking Elapsed Time
Mixed Indexes on Blue Dial for Enhanced Readability
Stainless Steel Case with PVD Gold Coating
Proprietary Hands for Unique Style

Specifications

Brand

Longines

Family

HydroConquest

Model

Hydroconquest Quartz 39 Two Tone Blue

Reference

L3.640.3.96.7

Movement

l263

Movement Features

Hours, Minutes, Seconds
Date

Case

Stainless Steel 39mm

Dial Color

Blue

Crystal

Sapphire

Water Resistance

300

Current Listings

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

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View listing on r/WatchExchange

Longines HydroConquest 43mm Automatic – Black Dial – Full Kit – $1,095

Longines - L3.782.4 · $1,095

This Longines HydroConquest automatic watch features a black dial and 43mm case size, which provides a strong wrist presence.

Condition: very good
Case size: 43mm diameter
Case wear: normal wear consistent with careful use

Posted at

Feb 18, 2026, 4:40 PM

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View listing on r/WatchExchange

Longines Hydroconquest 41m Green full kit with OEM bracelet and rubber strap

Longines - Hydroconquest 41m · $975

A green ceramic automatic watch from Longines, part of the Hydroconquest series, featuring a Swiss movement with 72-hour power reserve.

Condition: Used with signs of wear
Case diameter: 41 mm
Water resistance: 300m / 30 bar
Movement: Longines Calibre L888 series with 72hr power reserve

Posted at

Feb 16, 2026, 4:12 PM

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Longines Hydroconquest 41mm Blue - $850

Longines - L37424966 · $850

A Longines Hydroconquest 41mm automatic diver features a blue sunburst dial, matching blue ceramic bezel and has excellent timekeeping capabilities.

Condition: Excellent with light signs of wear
Case size: 41mm diameter
Bezel material: Ceramic
Bracelet condition: Light scuffs on the clasp

Posted at

Feb 11, 2026, 1:00 PM

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2024 Longines HydroConquest 43mm Black Ceramic L3.782.4

Longines - L3.782.4 · $999

2024 Longines HydroConquest watch with 43mm black ceramic case.

Case material: black ceramic
Size: 43mm diameter

Posted at

Feb 8, 2026, 1:07 PM

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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

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