Longines HydroConquest Hydroconquest Automatic 39 Black

Reference L3.641.4.56.6

About this watch

The Longines Hydroconquest Automatic 39 Black is a testament to the perfect fusion of functionality and sophistication, designed for both adventure and elegance. With its stunning black dial and striking stick and dot indexes, it offers a beautiful contrast that catches the light beautifully. The 39mm stainless steel case strikes a perfect balance between robust and refined, making it comfortable for everyday wear while still being tough enough for underwater adventures. At the core of this timepiece lies the Longines caliber L633.5, an automatic movement based on the renowned ETA 2824-2. This movement is celebrated for its reliability and accuracy, ensuring precise timekeeping with a frequency of 28,800 vibrations per hour. The Hydroconquest boasts a power reserve of approximately 38 hours, making it ideal for everyday wear. With a water resistance rating of 300 meters, this watch is designed to handle the pressure of aquatic activities. Its rotating bezel with a 0-60 scale allows you to track elapsed time underwater, ensuring your safety while looking incredibly stylish.

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Key Features

39mm stainless steel case
Longines caliber L633.5 automatic movement
Sapphire crystal glass for scratch resistance
300m water resistance
Rotating 0-60 bezel for dive tracking
Stainless steel bracelet with adjustable clasp

Specifications

Brand

Longines

Family

HydroConquest

Model

Hydroconquest Automatic 39 Black

Reference

L3.641.4.56.6

Movement

l633-5

Movement Features

Hours, Minutes, Seconds
Date

Case

Stainless Steel 39mm

Dial Color

Black

Crystal

Sapphire

Water Resistance

300

Current Listings

Longines Hydroconquest Quartz 44mm $540 USD shipped in the US

Posted at

Aug 2, 2025, 10:05 AM

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Longines Hydroconquest 41mm GMT

Posted at

Aug 1, 2025, 12:58 PM

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Longines Hydroconquest L3.781.4.06.6 (RESERVED POST)

Longines - L3.781.4.06.6 · $1,315

The seller is listing a Longines Hydroconquest watch for sale, which was previously posted as wanted in the r/watchexchange community.

Status: reserved post

Posted at

Jul 29, 2025, 4:04 PM

Active

View listing on r/WatchExchange

Longines Hydroconquest 41mm ceramic $800USD

Posted at

Jul 27, 2025, 5:03 PM

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View listing on r/WatchExchange

Longines Hydroconquest GMT, 41mm, Excellent Condition

Posted at

Jul 26, 2025, 11:54 PM

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View listing on r/WatchExchange

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

Posted at

Jul 26, 2025, 10:33 AM

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2024 Longines Hydroconquest 43mm Blue Automatic L3.782.4.96.6

Longines - L3.782.4.96.6 · $899

This listing is for a 2024 Longines Hydroconquest 43mm blue automatic watch, purchased new in May 2024 from Jomashop.

Condition: Fair
Size: 43mm
Case condition: Good

Posted at

Jul 23, 2025, 5:33 PM

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Longines Hydroconquest 39mm 2024model

Longines - Hydroconquest 39mm · $945.009

This watch was purchased brand new on 12/24 and has been worn only a few times. It is accurate and in great condition.

Condition: Pre-owned, lightly worn
Purchase year: 2024
Warranty: full factory warranty from AD

Posted at

Jul 22, 2025, 4:34 PM

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View listing on WatchUseek

Longines Hydroconquest 39mm New 12/24

Longines - Hydroconquest 39mm · $945.009

This Longines Hydroconquest 39mm is a brand new watch that was only worn on the bracelet a few times. It has been tried on with various straps and comes with a full five-year factory warranty from an authorized dealer.

Condition: Pre-owned, lightly worn
Warranty: Full five year factory warranty
Origin: Purchased from Authorized Dealer (AD)
Payment Methods: Accepts Zelle, Venmo, PayPal F&F

Posted at

Jul 22, 2025, 4:34 PM

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View listing on WatchUseek