Longines HydroConquest Hydroconquest Automatic 39 Blue

Reference L3.641.4.96.6

About this watch

The Longines Hydroconquest Automatic 39 Blue is a captivating timepiece that beautifully marries form and function. Its stunning blue dial, robust movement, and impressive water resistance make it a superb choice for divers and watch enthusiasts alike. Founded in 1832, Longines has established itself as a prestigious Swiss watchmaker with a legacy of elegance and precision. Renowned for their timeless designs and innovative technology, Longines watches have adorned the wrists of many adventurers, athletes, and watch enthusiasts. The Hydroconquest line, in particular, showcases Longines' commitment to quality and style while catering to dive watch lovers.

Buy Now on Jomashop

This is an affiliate link

Key Features

Stainless Steel Case
Rotating 0-60 Bezel (Dive)
Sapphire Crystal Glass
300M Water Resistance
Longines Caliber L633.5 Movement
Automatic with 38H Power Reserve
Date Function and Luminescent Hands

Specifications

Brand

Longines

Family

HydroConquest

Model

Hydroconquest Automatic 39 Blue

Reference

L3.641.4.96.6

Movement

l633-5

Movement Features

Hours, Minutes, Seconds
Date

Case

Stainless Steel 39mm

Dial Color

Blue

Crystal

Sapphire

Water Resistance

300

Current Listings

Longines Hydroconquest 43mm - $950

Longines - Hydroconquest 43mm · $950

This Longines HydroConquest 43mm is in excellent working order and comes with a WatchMaxx full kit.

Condition: Great condition
Depth rating: 200m

Posted at

Aug 21, 2025, 12:02 AM

Active

View listing on r/WatchExchange

Longines HydroConquest Ref. L3.780.3 – Two-Tone Steel & Rose Gold PVD – 39mm Automatic Diver – $999 Shipped

Longines - L3.780.3 · $999

a Longines HydroConquest Ref. L3.780.3, a Two-Tone Steel & Rose Gold PVD automatic diver watch with a 39mm case size.

Case Material: steel and rose gold PVD
Water Resistance: 39mm diameter

Posted at

Aug 18, 2025, 9:52 PM

Active

View listing on r/WatchExchange

Longines Hydroconquest Automatic 41MM - Green Ceramic Bezel

Longines - L3.781.4.05.2 · $1,240

This Longines HydroConquest features a green ceramic bezel, automatic movement with date display, and a power reserve of up to 72 hours.

Condition: Like new/never worn
Case size: 41mm diameter
Water resistance: 30 bar
Crystal material: scratch-resistant sapphire crystal

Posted at

Aug 18, 2025, 7:39 PM

Active

View listing on r/WatchExchange

For Sale – Longines HydroConquest Automatic (Ref. L3.649.4, Navy Dial) – €600 ONO Automatic 41mm with the navy blue dial.

Posted at

Aug 16, 2025, 7:17 AM

Active

View listing on r/WatchExchange

Longines Hydroconquest Quartz 39mm - Very good condition - $500 shipped in US

Posted at

Aug 14, 2025, 7:47 PM

Active

View listing on r/WatchExchange

Longines Hydroconquest GMT Black 41mm - Full set with extras $1850

Longines - Hydroconquest GMT Black 41mm · $1,850

41mm Longines Hydroconquest GMT with full set of extras, including OEM rubber strap and two additional straps.

Condition: Excellent
Case size: 41mm
Included extras: Longines black rubber strap, Longines style leather strap, orange cut-to-size strap

Posted at

Aug 11, 2025, 4:30 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