Longines HydroConquest Hydroconquest 43 Automatic Ceramic / Black / Rubber

Reference L3.784.4.56.9

Longines Hydroconquest 43 Automatic Ceramic / Black / Rubber

About this watch

The Longines HydroConquest L3.784.4.56.9 is a stunning luxury watch that embodies the spirit of adventure and sophistication. With its robust design, reliable movement, and versatile aesthetics, this 43mm automatic ceramic timepiece can transition seamlessly from underwater exploration to formal occasions. The black ceramic case features a sleek, modern look, while the mixed indexes and stick hands ensure easy readability in low-light conditions. The rotating bezel with a 0-60 scale allows for precise timing of your underwater adventures, making it an essential feature for divers. With a water resistance of up to 300 meters and a durable rubber strap, this watch is perfect for both seasoned divers and casual wearers alike. The Longines caliber L888.3 movement boasts reliability and performance, with a power reserve of 65 hours and a frequency of 25,200 vibrations per hour. This watch is not just a statement piece; it's a lifestyle choice that combines luxury with functionality.
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Key Features

  • 43mm black ceramic case
  • Longines caliber L888.3 automatic movement
  • Sapphire glass
  • 300m water resistance
  • Durable rubber strap
  • Rotating 0-60 bezel
  • Mixed indexes and stick hands

Specifications

Brand
Longines
Family
HydroConquest
Model
Hydroconquest 43 Automatic Ceramic / Black / Rubber
Reference
L3.784.4.56.9
Movement
l888-3
Movement Features
  • Hours, Minutes, Seconds
  • Date
Case
43mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
300

Current Listings

[WTS] Longines Hydroconquest Blue 39mm - $1150

Longines Hydroconquest Blue 39mm - $1150

Longines - Hydroconquest · $1,150
A blue dial Longines Hydroconquest 39mm watch with a full kit, in excellent condition and keeping good time.

  • Condition: Great condition
  • Year purchased: 2025
  • Warranty duration: 5 years
Posted at
Mar 1, 2026, 8:14 PM
Active
View listing on r/WatchExchange
[WTS] Longines Hydroconquest 41mm Two Tone

Longines Hydroconquest 41mm Two Tone

Longines - Hydroconquest 41mm Two Tone · $999
A Longines Hydroconquest 41mm Two Tone watch with a black dial and two tone finish. It is in very good condition with some minor wear.

  • Condition: Very Good Pre Owned Condition
  • Diameter: 41mm
Posted at
Feb 27, 2026, 3:34 PM
Active
View listing on r/WatchExchange
[WTS] Longines HydroConquest GMT 41mm L3.790.4

Longines HydroConquest GMT 41mm L3.790.4

Longines - L3.790.4 · $1,799
This Longines HydroConquest GMT is a 41mm watch featuring a 6.5 inch bracelet and an aftermarket rubber strap with deployant.

  • Bracelet Length: 6.5 inches
  • Case Size: 41mm
Posted at
Feb 19, 2026, 5:35 PM
Active
View listing on r/WatchExchange
[WTS] Longines HydroConquest 43mm Automatic – Black Dial – Full Kit – $1,095

Longines HydroConquest 43mm Automatic – Black Dial – Full Kit – $1,095

Longines - L3.782.4 · $1,095
This Longines HydroConquest automatic watch features a black dial and 43mm case size, which provides a strong wrist presence.

  • Condition: very good
  • Case size: 43mm diameter
  • Case wear: normal wear consistent with careful use
Posted at
Feb 18, 2026, 4:40 PM
Active
View listing on r/WatchExchange
[WTS] Longines Hydroconquest 41m Green full kit with OEM bracelet and rubber strap

Longines Hydroconquest 41m Green full kit with OEM bracelet and rubber strap

Longines - Hydroconquest 41m · $975
A green ceramic automatic watch from Longines, part of the Hydroconquest series, featuring a Swiss movement with 72-hour power reserve.

  • Condition: Used with signs of wear
  • Case diameter: 41 mm
  • Water resistance: 300m / 30 bar
  • Movement: Longines Calibre L888 series with 72hr power reserve
Posted at
Feb 16, 2026, 4:12 PM
Active
View listing on r/WatchExchange
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
View listing on RolexForums