Longines HydroConquest Hydroconquest Automatic 39

Reference L3.648.4.16.6

About this watch

The Longines Hydroconquest Automatic 39, model L3.648.4.16.6, is an embodiment of style and functionality in the world of luxury watches. Founded in 1832, Longines has a rich history of watchmaking that marries tradition with innovation. This remarkable timepiece boasts a stunning design that seamlessly blends elegance and sportiness, making it suitable for both casual wear and formal occasions. The round stainless steel case features a polished finish that catches the light beautifully, while the pristine white dial exudes sophistication. The watch is equipped with a scratch-resistant sapphire crystal, ensuring its durability even with regular wear. At the heart of the Hydroconquest lies the Longines caliber L633.5, a robust automatic movement renowned for its reliability and accuracy. This movement boasts a frequency of 28,800 vibrations per hour, offering precise timekeeping that you can trust. With a water resistance of up to 300 meters (or 1000 feet), this watch is designed to withstand the pressures of deep-sea adventures. The unidirectional rotating bezel allows for accurate tracking of elapsed time underwater, while the stainless steel bracelet adds to its rugged aesthetic and comfort. This luxury watch offers excellent value for money, making it a fantastic choice for anyone looking to invest in a high-quality timepiece without breaking the bank.

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Key Features

Longines caliber L633.5 automatic movement
Stainless Steel case with polished finish
Scratch-resistant sapphire crystal
Water resistance up to 300 meters (1000 feet)
Unidirectional rotating bezel for dive time tracking
Stainless Steel bracelet for durability and comfort

Specifications

Brand

Longines

Family

HydroConquest

Model

Hydroconquest Automatic 39

Reference

L3.648.4.16.6

Movement

l633-5

Movement Features

Hours, Minutes, Seconds
Date

Case

Stainless Steel 39mm

Dial Color

White

Crystal

Sapphire

Water Resistance

300

Current Listings

2026 Longines HydroConquest 42mm "Hulk" Green, bought 29 days ago

Longines - L3.788.4.06.6 · $2,100

This listing is for a brand new 2026 Longines HydroConquest 'Hulk' Green, featuring an updated dial layout and high-performance L888.5 movement.

Condition: Near-mint
Movement: L888.5
Bezel material: Green Ceramic
Depth rating: 300m

Posted at

May 3, 2026, 2:46 PM

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New Longines HydroConquest 42mm Frosted Blue Dial

Longines - HydroConquest 42mm · $2,100

A brand new Longines HydroConquest with a frosted blue dial in 42mm size.

Condition: new
Case size: 42mm
Diameter: 42mm

Posted at

May 3, 2026, 1:20 PM

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Longines HydroConquest GMT Blue Ref: L3.790.4.96.6 (2026). New/Complete. $1,999

Longines - L3.790.4.96.6 (2026) · $1,999

The Longines HydroConquest GMT Blue is a true GMT diver with a sunray blue dial, blue ceramic bezel, and Calibre L844.5 automatic movement.

Condition: Brand New
Case diameter: 41mm
Water resistance: 300m
Movement type: Calibre L844.5 automatic

Posted at

May 1, 2026, 8:25 PM

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New Longines Hydroconquest 42mm Frosted Blue Dial

Longines - Hydroconquest 42mm · $2,200

A brand new Longines Hydroconquest 42mm with a frosted blue dial, sold exclusively at Corporate boutiques. The watch comes with all links, papers, and box.

Condition: Brand new
Diameter: 42mm

Posted at

May 1, 2026, 10:36 AM

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2026 Longines HydroConquest L37884906 42 mm Black Dial Blue Bezel Full Set $1,900

Longines - L37884906 · $1,900

The Longines HydroConquest L37884906 features a black dial and blue ceramic bezel, with an automatic movement providing reliable performance. The watch has a robust build, unidirectional dive bezel, and strong water resistance, making it a capable tool watch while maintaining a refined aesthetic.

Condition: Excellent (pre-owned, minimal wear)
Year: 2026
Case size: 42mm diameter
Case material: Stainless steel

Posted at

Apr 30, 2026, 10:26 PM

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Longines HydroConquest Green Dial Two Tone $1350 41mm

Longines - HydroConquest · $1,350

This Longines HydroConquest features a green dial and two-tone design.

Posted at

Apr 28, 2026, 9:41 AM

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Longines HydroConquest 43mm

Longines - HydroConquest 43mm · $800

A Longines HydroConquest 43mm diver watch for sale, with excellent timekeeping and minimal signs of wear.

Condition: Pre-owned with normal wear
Bracelet condition: normal wear with worn clasp
Case condition: scratch-free except on the back
Papers included: true

Posted at

Apr 27, 2026, 9:05 PM

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Longines HydroConquest 39mm 2026 Commonwealth Games Limited Edition

Longines - HydroConquest 39mm 2026 Commonwealth Games Limited Edition · $3,595

This is a brand new, unworn Longines HydroConquest limited edition watch from the 2026 Commonwealth Games collection. It features a 39mm case and comes with various accessories.

Condition: Brand New Unworn
Case size: 39mm
Limited edition status: One of 2026

Posted at

Apr 27, 2026, 11:58 AM

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