Longines HydroConquest HydroConquest 39 Automatic Stainless Steel / Black / Bracelet

Reference L3.780.4.56.6

Longines HydroConquest 39 Automatic Stainless Steel / Black / Bracelet

About this watch

The Longines HydroConquest 39 Automatic is a masterful blend of style, precision, and durability. This luxury watch boasts a striking black dial with a matte finish, adding a sophisticated touch to its sporty design. The rotating bezel with a bold 0-60 dive scale gives it an edgy feel, perfect for both formal and casual settings. Built from stainless steel and ceramic, this watch is designed to withstand the rigors of underwater adventures and daily wear alike. Its robust construction ensures that your HydroConquest stays pristine even after years of use. With a diameter of 39.00 mm and a height of 12.20 mm, it's a comfortable fit for most wrist sizes. The Longines caliber L888.5 automatic movement provides accuracy and reliability, boasting chronometer certification and a power reserve of 64 hours. This means you'll always be on time, making every second count. With features like date display, water resistance up to 300 meters, and a rotating bezel for tracking elapsed time underwater, this watch is designed for functionality and safety. Whether you're diving deep or just enjoying a casual day, the HydroConquest will keep you looking sharp and feeling confident.

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Key Features

Automatic movement with chronometer certification
Water resistance up to 300 meters
Rotating bezel for tracking elapsed time underwater
Date display for easy timekeeping
Stainless steel and ceramic construction for durability
Chronograph functionality for precise time measurement

Specifications

Brand

Longines

Family

HydroConquest

Model

HydroConquest 39 Automatic Stainless Steel / Black / Bracelet

Reference

L3.780.4.56.6

Movement

l888-5

Movement Features

Hours, Minutes, Seconds
Date
Chronometer

Case

39mm

Dial Color

Black

Crystal

Sapphire

Water Resistance

300

Current Listings

Longines HydroConquest 39 mm Black (Ref. L3.780.4.56.6) – Full Kit

Longines - L3.780.4.56.6 · $999

The Longines HydroConquest 39 mm Black is a stainless steel automatic watch featuring a black sunray dial, applied indices, and date at 3 o'clock. It has a matte black ceramic unidirectional bezel and a sapphire crystal with AR coating.

Condition: Very good, light desk-wear with minor hairline scratches
Case Size: 39 mm stainless steel case
Dial Color: Black
Water Resistance: 300 m

Posted at

May 10, 2025, 10:11 AM

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Longines HydroConquest 39 mm Black (Ref. L3.780.4.56.6) – Full Kit

Longines - L3.780.4.56.6 · $1,150

The Longines HydroConquest 39 mm Black is a stainless steel automatic watch with a black sunray dial, applied indices, and date at 3 o'clock. It features a matte black ceramic bezel, sapphire crystal with AR coating, and a 300m water resistance.

Condition: Very good, with light desk-wear and a few small hairline scratches
Case Size: 39 mm diameter
Water Resistance: 300 m depth rating
Movement: Longines L888 automatic, up to 72 hr power reserve

Posted at

May 3, 2025, 1:07 PM

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Longines HydroConquest Black dial 41mm $1499

Longines - L3.783.4.56.6 · $1,499

This Longines HydroConquest features a black dial and is powered by an automatic movement, housed in a stainless steel case with sapphire crystal and a stainless steel bracelet.

Condition: Full working order
Case diameter: 41mm
Crystal material: Sapphire

Posted at

May 9, 2025, 3:09 AM

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Longines Hydroconquest 41mm w/ Box

Longines - 41mm Hydroconquest (no specific model number mentioned) · $625

A Longines Hydroconquest watch in 41mm case size, excluding crown guards.

Bracelet markings: noticeable
Wrist size: 7 inches

Posted at

May 8, 2025, 5:46 PM

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Longines HydroConquest GMT 43mm Green – Full Kit - Excellent Condition

Longines - L3.890.4.06.6 · $2,200

The Longines HydroConquest GMT is a 43mm automatic diver-watch with a ceramic bezel, 300m water resistance, and a green sunburst dial.

Condition: Excellent
Case Size: 43mm diameter
Movement: L844.5 (72hr power reserve, COSC certified)
Water Resistance: 300m depth rating

Posted at

May 4, 2025, 6:59 PM

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Longines HydroConquest Blue - L3.780.4.96.6

Longines - L3.780.4.96.6 · $1,000

A Longines HydroConquest Blue watch with a retail price of $1850 is being sold for $1000.

Posted at

May 3, 2025, 4:30 PM

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[WTS][CA-USA][H] Longines Hydroconquest 41mm Blue | Seiko Prospex “62MAS” SPB423 US Special Edition | Hamilton Murph 42mm | Seiko Speedtimer Panda SSC813 | Orient Dive 43mm [W] $800 | $700 | $625 | $400 | $150 PayPal F&F, venmo, zelle, local cash

[CA-USA][H] Longines Hydroconquest 41mm Blue | Seiko Prospex “62MAS” SPB423 US Special Edition | Hamilton Murph 42mm | Seiko Speedtimer Panda SSC813 | Orient Dive 43mm [W] $800 | $700 | $625 | $400 | $150 PayPal F&F, venmo, zelle, local cash

Longines - L3.742.4.96.6 · $800

Legendary Hydroconquest auto blue with gray market warranty, purchased last month and comes full kit with stock bracelet.

Gray market warranty: yes
Purchase date: last month
Warranty status: never been worn outside

Posted at

May 2, 2025, 9:56 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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