Longines HydroConquest HydroConquest 39 Automatic Stainless Steel / Black / Rubber

Reference L3.780.4.56.9

Longines HydroConquest 39 Automatic Stainless Steel / Black / Rubber

About this watch

The Longines HydroConquest 39 Automatic is a remarkable watch that beautifully marries style and functionality. From its robust design to its precise movement, it’s a watch that not only tells time but also tells a story—your story. With a striking design and robust functionality, this watch is a true contender in the realm of diving timepieces. The HydroConquest boasts a chronometer certification, ensuring accuracy and precision in its timekeeping. Wearing a watch should feel like a second skin, and the HydroConquest excels in this department with its comfortable fit and adjustable rubber strap. It’s suitable for professional diving activities and offers a contemporary twist on classic diving aesthetics. The Longines caliber L888.5 movement features a silicon balance spring, enhancing precision and reliability.

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Key Features

Stainless Steel Case
300m Water Resistance
Chronometer Certification
Longines Caliber L888.5 Movement
Silicon Balance Spring
Adjustable Rubber Strap
39mm Diameter

Specifications

Brand

Longines

Family

HydroConquest

Model

HydroConquest 39 Automatic Stainless Steel / Black / Rubber

Reference

L3.780.4.56.9

Movement

l888-5

Movement Features

Hours, Minutes, Seconds
Date
Chronometer

Case

39mm

Dial Color

Black

Crystal

Sapphire

Water Resistance

300

Current Listings

CHRISTMAS SPECIAL Longines Hydroconquest L3.742.4 Automatic 41mm Diver $650 OBO

Longines - L3.742.4 · $650

This Longines Hydroconquest L3.742.4 is a 41mm automatic diver's watch that keeps time well with no issues.

Condition: Good overall with minor scratches and wear
Case size: 41mm diameter
Movement type: Automatic

Posted at

Dec 25, 2025, 1:57 PM

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Longines Hydroconquest L3.742.4 Automatic 41mm Diver $700 OBO

Longines - L3.742.4 · $700

This Longines Hydroconquest L3.742.4 is a 41mm automatic diver's watch that keeps time well and runs smoothly.

Condition: Good overall, with minor scratches on the bezel and case
Case Size: 41mm diameter
Movement Type: automatic

Posted at

Dec 24, 2025, 11:07 AM

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Longines Hydroconquest Two Tone Ceramic Bezel Full Kit Mint on OEM Rubber

Longines - L3.782.3.98.9 · $1,099

This is a two-tone Longines Hydroconquest with a radiant sunburst blue dial, featuring a 41mm version of the watch that's more wearable than its 43mm counterpart.

Condition: Mint on OEM rubber strap
Model size: 41mm diameter
Case material: two tone
Bezel type: ceramic

Posted at

Dec 22, 2025, 10:59 PM

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Monta Oceanking 40 blue bezel black dial, 1 of 2 produced....Longines Hydroconquest 43 gray sunburst dial. Full sets. Thanks.

Monta - Oceanking 40 · $1,850

This listing features a Monta Oceanking 40 with a blue bezel and black dial, one of two produced, as well as a Longines Hydroconquest 43 with a gray sunburst dial.

Condition: 9.5/10
Case size: 40mm

Posted at

Dec 18, 2025, 9:49 PM

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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

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