Longines HydroConquest Hydroconquest Automatic 39

Reference L3.648.4.76.6

About this watch

The Longines Hydroconquest Automatic 39 is an exemplary timepiece that seamlessly blends elegance and ruggedness. Its stunning silver stainless steel case exudes sophistication, making it suitable for both formal and casual occasions. The rotating bezel adds a sporty flair to the watch, while the clean and minimalist dial features stick and dot indexes for excellent readability. At the core of the Hydroconquest is the reliable Longines caliber L633.5 movement, which winds itself as you wear it. With a water resistance of 300 meters, this watch is built for serious underwater adventures. Its comfortable fit and sleek design make it an ideal choice for daily wear, whether you're exploring the ocean depths or simply enjoying a night out.

Buy Now on Jomashop

This is an affiliate link

Key Features

Longines caliber L633.5 movement with 25 jewels
Stainless steel case with rotating bezel and sapphire glass
300 meters water resistance for serious underwater adventures
Reliable automatic winding for precise timekeeping
39 mm diameter with comfortable fit for daily wear
Sleek design with silver color and stick/dot indexes

Specifications

Brand

Longines

Family

HydroConquest

Model

Hydroconquest Automatic 39

Reference

L3.648.4.76.6

Movement

l633-5

Movement Features

Hours, Minutes, Seconds
Date

Case

Stainless Steel 39mm

Dial Color

Silver

Crystal

Sapphire

Water Resistance

300

Current Listings

Longines Hydroconquest 41mm LNIB

Longines - Hydroconquest 41mm · $900

41mm Longines Hydroconquest for sale in excellent condition, comes with a full set.

Condition: Like New In Box (LNIB)
Shipped: true

Posted at

Sep 5, 2025, 11:51 AM

Active

View listing on r/WatchExchange

Longines HydroConquest Steel 44 Black Dial (Full-Set/Unpolished)

Longines - L3.841.4.56.6 · $995

A full steel diver's watch presented in outstanding condition, complete with its original box and papers.

Condition: Full-set/unpolished, never polished, excellent condition
Case size: 44mm diameter
Bracelet size: 8.5” / 21cm
Depth rating: no mention of depth rating

Posted at

Sep 4, 2025, 1:31 PM

Active

View listing on r/WatchExchange

Longines Hydroconquest Green 41mm

Longines - 41mm Hydroconquest · $925

A 41mm Hydroconquest Green, a sporty yet elegant watch from Longines, featuring a rubber strap and a durable design.

Condition: Pre-owned with scuffs on clasp and lugs
Size: 41mm diameter
Strap Size Fit: 7.25 inches and smaller
Retail Price: 1775

Posted at

Sep 2, 2025, 9:13 AM

Active

View listing on r/WatchExchange

Longines Hydroconquest GMT 43mm Olive Dial Ref L3.890.4.06.6 Full Kit $1700 net to me

Longines - L3.890.4.06.6 · $1,700

The Longines Hydroconquest GMT is a serious dive watch with a striking sun ray olive dial and ceramic bezel, featuring a 43mm case, 300m water resistance, and L844 Caliber.

Condition: Excellent with small marks on the clasp
Case size: 43mm diameter
Water resistance: 300m depth rating
Thickness: 12.9mm

Posted at

Aug 30, 2025, 11:02 AM

Active

View listing on r/WatchExchange

Longines HydroConquest Steel 44 Black Dial (Full-Set/Unpolished)

Posted at

Aug 27, 2025, 4:19 PM

Active

View listing on r/WatchExchange

Longines HydroConquest Blue 41mm – $850

Posted at

Aug 26, 2025, 9:06 PM

Active

View listing on r/WatchExchange

Longines Hydroconquest 39mm

Posted at

Aug 25, 2025, 6:19 PM

Active

View listing on r/WatchExchange

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

View listing on RolexForums