Longines HydroConquest Hydroconquest Chronograph

Reference L3.673.4.76.6

About this watch

The Longines Hydroconquest Chronograph (L3.673.4.76.6) is a luxurious dive watch that embodies the spirit of exploration and adventure. Its sleek stainless steel body, combined with a rotating bezel, gives it a rugged yet sophisticated look perfect for both underwater escapades and formal gatherings. Powered by the ETA caliber 7750 movement, this automatic timepiece features a chronograph function, date display, and 25 jewels for smooth movement. The watch boasts an impressive water resistance of 300 meters and a durable stainless steel bracelet that feels secure on the wrist. With its remarkable features and timeless design, it's not just a watch; it's a statement of luxury and sophistication.

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Key Features

Stainless steel body with rotating bezel
ETA caliber 7750 automatic movement
Chronograph function for precise time tracking
Date display and day indication
25 jewels for smooth movement
300-meter water resistance
Durable stainless steel bracelet

Specifications

Brand

Longines

Family

HydroConquest

Model

Hydroconquest Chronograph

Reference

L3.673.4.76.6

Movement

7750

Movement Features

Hours, Minutes, Small Seconds
Date, Day
Chronograph

Case

Stainless Steel 41mm

Dial Color

Silver

Crystal

Sapphire

Water Resistance

300

Current Listings

Longines HydroConquest 42mm | 2026 Gen | Green Ceramic | Green Lacquered Dial | Ref. L3.788.4.06.6 | Never Sized, Never Worn | Full Kit | Warranty Card 5/8/26

Longines - L3.788.4.06.6 · $1,999

This is the first real redesign the HydroConquest has seen in nearly a decade with thinner case and upgraded ceramic bezel with audible click.

Condition: Never sized, never worn
Movement: Calibre L888.5, automatic, silicon balance spring, 72hr power reserve
Water resistance: 300m / 30 bar
Box papers: Full double-box set with instruction manual and tags present

Posted at

May 16, 2026, 10:58 AM

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Longines Hydroconquest 41mm Black dial

Longines - L3.781.4.56 · $1,100

A Longines Hydroconquest 41mm with a black dial is being sold. The watch features an original box and bracelet, as well as two additional straps.

Condition: Very good condition, a few scuffs on the sapphire but no scratches
Case size: 41mm
Bracelets: 2
Straps: 2

Posted at

May 15, 2026, 2:06 PM

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Longines Hydroconquest 39mm L3.779.4.96.6

Longines - L3.779.4.96.6 · $2,100

A Longines Hydroconquest 39mm with a frosted blue dial, this watch features a unique and stylish design.

Condition: Like new
Size: 39mm diameter

Posted at

May 14, 2026, 10:43 PM

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Longines Hydroconquest 39mm

Longines - HydroConquest 39mm · $2,000

A Longines Hydroconquest diver's watch in excellent condition, featuring a 2026 movement and virtually no signs of wear.

Condition: 9.6/10 - extremely clean example
Movement: 2026
Case condition: virtually no signs of wear
Box included: true

Posted at

May 14, 2026, 10:36 PM

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Longines Hydroconquest 39mm Limited Edition Commonwealth Games Mint

Longines - L3.779.4.09.9 · $2,950

A limited edition Longines Hydroconquest, purchased just a week ago and still under warranty.

Condition: Mint
Case Size: 39mm
Limited Edition Quantity: 2026 pieces
Warranty Length: five years

Posted at

May 12, 2026, 4:37 PM

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Longines HydroConquest 39mm Automatic Black Ceramic Bezel + Bracelet + WOE NATO - $750

Longines - HydroConquest 39mm · $750

This Longines HydroConquest is an excellent daily-wear diver with great proportions and comfortable sizing, featuring a black dial and ceramic bezel. The watch is running well and keeping great time.

Condition: Excellent daily-wear, shows wear from use on the bracelet
Case Size: 39mm diameter
Bracelet Type: black ceramic bezel + bracelet + WOE NATO

Posted at

May 12, 2026, 4:18 PM

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Longines Hydroconquest Quartz Two Tone L3.740.3.56.7 - $600 🚢

Longines - L3.740.3.56.7 · $600

A quartz-powered diver's watch from Longines, featuring a black dial and two-tone yellow gold PVD finish on the 41mm case.

Condition: Good (light scratches)
Case size: 41mm
Material: two tone yellow gold PVD
Movement: quartz

Posted at

May 10, 2026, 5:48 PM

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Longines Hydroconquest 43mm (updated pictures)

Longines - L3.782.4.56.6 · $1,260

This Longines Hydroconquest 43mm features a black dial on a stainless steel bracelet and has been worn only 4-6 times since its purchase. It comes with a full set, including the box, tags, warranty cards, and is still under Jomashop's 2-year warranty.

Condition: Fantastic, worn 4-6 times
Case size: 43mm
Lug to lug: 53mm
Thickness: 11.90mm

Posted at

May 9, 2026, 4:10 PM

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(brand new) Longines HydroConquest 39mm - $1800 shipped

Longines - HydroConquest · $1,800

This brand new Longines HydroConquest features a black dial, stainless steel case and bracelet, sapphire crystal with anti-reflective coating, and is powered by the L888.4 automatic movement.

Condition: Unworn
Case material: stainless steel
Bracelet material: stainless steel
Water resistance: 300m

Posted at

May 9, 2026, 1:11 PM

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