Longines HydroConquest Hydroconquest Automatic 39

Reference L3.648.4.56.6

About this watch

The Longines Hydroconquest Automatic 39 is a luxury dive watch that exudes elegance and sophistication. Its sleek design, robust build, and black dial make it a statement piece on the wrist. The watch's rotating bezel, marked from 0 to 60, is ideal for timing dives or other activities, while its sapphire glass ensures scratch-resistance and durability. Powered by the Longines caliber L633.5 automatic movement, this watch boasts a frequency of 28,800 beats per hour and a power reserve of 38 hours. With water resistance up to 300 meters, it's built for serious use, whether diving into the ocean or splashing around in the pool. The stainless steel bracelet feels sturdy yet comfortable on the wrist, making it perfect for all-day wear. This watch is not just a timekeeper, but an investment in style, functionality, and durability.
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Key Features

  • Automatic Movement
  • Water Resistance up to 300m
  • Sapphire Glass
  • Stainless Steel Case and Bracelet
  • Rotating Bezel with 0-60 Markings

Specifications

Brand
Longines
Family
HydroConquest
Model
Hydroconquest Automatic 39
Reference
L3.648.4.56.6
Movement
l633-5
Movement Features
  • Hours, Minutes, Seconds
  • Date
Case
Stainless Steel 39mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
300

Current Listings

[WTS]✨ For sale: Longines HydroConquest L3.841.4.56.6 (2019) – Full Set!

✨ For sale: Longines HydroConquest L3.841.4.56.6 (2019) – Full Set!

The Longines HydroConquest L3.841.4.56.6 is an automatic watch with a 64-hour power reserve, featuring a 44mm stainless steel case and a black sunray dial.

  • Condition: Excellent
  • Case material: stainless steel
  • Diameter: 44mm
  • Water resistance: 300m
Posted at
May 13, 2025, 11:10 AM
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[WTS] Longines Hydroconquest GMT - Green

Longines Hydroconquest GMT - Green

The Longines Hydroconquest GMT is a stylish and functional watch featuring a GMT function, perfect for travelers or those who need to keep track of multiple time zones.

  • Condition: great condition with a slight scratch on the case and some wear on the bracelet
  • Warranty Valid Until: 02/23/2024
  • Bracelet Condition: some wear from regular usage
Posted at
May 13, 2025, 10:58 AM
Active
[WTS] Longines HydroConquest 39 mm Black (Ref. L3.780.4.56.6) – Full Kit

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

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
Active
[WTS] Longines HydroConquest Black dial 41mm $1499

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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[WTS] Longines Hydroconquest 41mm w/ Box

Longines Hydroconquest 41mm w/ Box

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
Active
[WTS] Longines HydroConquest GMT 43mm Green – Full Kit - Excellent Condition

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
Active
[WTS] Longines HydroConquest Blue - L3.780.4.96.6

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
Active
[WTS]  Longines HydroConquest 39 mm Black (Ref. L3.780.4.56.6) – Full Kit

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
Active
Longines HydroConquest, L3.781.4.06.9, Steel Diver, Olive, Excellent Condition.

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
Active