Longines HydroConquest Hydroconquest Automatic 41 Black

Reference L3.642.4.56.6

About this watch

The Longines Hydroconquest Automatic 41 Black is a masterclass in watchmaking, combining style, functionality, and durability in a way that few watches can match. This stunning timepiece embodies elegance while standing up to the rigors of everyday life, making it perfect for anyone who appreciates fine craftsmanship and robust performance. With its impressive water resistance of up to 300 meters, automatic movement, and stunning design, this watch truly ticks all the boxes. Whether you're a diving enthusiast, a frequent traveler, or simply someone who loves a high-quality watch, the Hydroconquest is versatile enough to suit various lifestyles. Its classic design appeals to many tastes, and its functionality ensures it will be appreciated for years to come.

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Key Features

Longines Caliber L633.5 Automatic Movement
Sapphire Crystal Glass with Scratch Resistance
300 Meter Water Resistance Rating
41 mm Round Stainless Steel Case
Rotating Dive Bezel and Proprietary Hands

Specifications

Brand

Longines

Family

HydroConquest

Model

Hydroconquest Automatic 41 Black

Reference

L3.642.4.56.6

Movement

l633-5

Movement Features

Hours, Minutes, Seconds
Date

Case

Stainless Steel 41mm

Dial Color

Black

Crystal

Sapphire

Water Resistance

300

Current Listings

Longines HydroConquest “Boutique Exclusive Edition” L3.779.4.98.6 – 42mm – April 2026 Card — Full Kit - $2,199 Shipped 🔥🔥

Longines - L3.779.4.98.6 · $2,199

This Longines HydroConquest 'Boutique Exclusive Edition' is a sporty yet versatile watch featuring an automatic movement, available in a full kit with essentially new warranty card.

Condition: Excellent overall with light handling hairlines on case and bracelet
Case size: 42mm
Movement type: Automatic

Posted at

Apr 16, 2026, 9:35 PM

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Longines Hydroconquest 43mm Ceramic

Longines - Hydroconquest · $950

Additional Details: This Longines Hydroconquest 43mm Ceramic is a Sunray Gray watch that comes with full links, blank card, booklets, hang tags and box. The watch has some minor hairlines on the bracelet.

Condition: very nice pre-owned
Length: 43mm diameter

Posted at

Apr 16, 2026, 9:33 PM

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Longines HydroConquest 41mm Green $899

Longines - L3.781.4.06.9 · $899

This Longines HydroConquest is a 41mm men's watch with a green dial, featuring a rubber strap and a crystal in perfect shape.

Condition: Pre-owned, minor scratches on clasp
Case Size: 41mm diameter
Strap Length: 7.5in
Crystal Condition: Perfect shape

Posted at

Apr 16, 2026, 9:18 PM

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2026 Longines Hydroconquest 39mm - Grey Bezel / Black Dial

Longines - L3-779-4-70-6 · $2,100

This 2026 Longines Hydroconquest is a 39mm grey bezel/black dial watch, purchased directly from Longines and regularly worn. It's free of major scratches or dents but has minor wear on the back of one lug.

Condition: Excellent to LNIB (like new in box)
Bracelet length: up to an 8in wrist
Bent link pin: one link pin is bent and unusable
Included accessories: all original packaging, accessories, and paperwork

Posted at

Apr 16, 2026, 3:09 PM

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Longines HydroConquest Sunray Blue- L3.790.4.96.6

Longines - L3.790.4.96.6 · $2,900

A brand new Longines HydroConquest with sunray blue dial, featuring a new box and papers.

Condition: Brand new
Box And Papers: brand new

Posted at

Apr 16, 2026, 12:11 PM

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[WTS] Longines HydroConquest GMT - Unworn, Full Set, Black Dial 41mm. The watch is in completely unworn condition and comes as a full set including box, papers, and all original accessories. Price:1700. UK-based. Happy to ship or meet depending on location. Dm if interested

Longines HydroConquest GMT - Unworn, Full Set, Black Dial 41mm. The watch is in completely unworn condition and comes as a full set including box, papers, and all original accessories. Price:1700. UK-based. Happy to ship or meet depending on location. Dm if interested

Longines - HydroConquest GMT · $1,700

The Longines HydroConquest GMT is a 41mm timepiece that comes as a full set including box, papers, and all original accessories. It is in completely unworn condition.

Condition: Unworn
Case Size: 41mm
Set: Full set including box, papers, and all original accessories

Posted at

Apr 16, 2026, 11:26 AM

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Longines Hydroconquest GMT 41mm Black (Nov 2024)- $2950 AUD (Sydney, Australia)

Longines - L3.826.4.53.2 · $2,950

a black Longines Hydroconquest GMT watch with a 41mm case size.

Material: Stainless Steel
Diameter: 41mm
Depth rating: 300m

Posted at

Apr 16, 2026, 9:54 AM

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Longines HydroConquest 41mm

Longines - L3.781.4.96.6 · $1,100

A Longines HydroConquest 41mm watch with a blue sunburst dial, featuring a clean crystal and flawless dial.

Condition: Excellent pre-owned condition
Diameter: 41mm

Posted at

Apr 15, 2026, 3:43 PM

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Longines Hydroconquest Chronograph 41 Ref. L3.783.4 – Travel Box & Manual | $1,900

Longines - L3.783.4 · $1,900

This Longines Hydroconquest Chronograph is a high-performance Swiss diver's watch featuring a blue ceramic bezel and screw-down crown, powered by the calibre L688.2 column-wheel chronograph movement with a 54-hour power reserve.

Condition: Very good with minor usage marks
Case Size: 41mm x 51mm stainless steel case, 15.6mm thickness, 21mm lug width
Movement: Longines L688.2 automatic column wheel chronograph with 27 jewels, 28,800 bph, and a 54-hour power reserve
Water Resistance: 300m (30 ATM)

Posted at

Apr 15, 2026, 11:30 AM

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