HydroConquest 42mm black on bracelet diver watch with black dial, date window, and unidirectional bezel.
HydroConquest 42mm black dial diver watch on stainless steel bracelet with rotating bezel
Close up of HydroConquest 42mm black dial diver watch revealing bezel crown and bracelet
HydroConquest 42mm black dial with date window on stainless steel bracelet from a tilted side view
Back of stainless steel HydroConquest watch on a bracelet with the globe emblem and engravings
Close up of HydroConquest case back showing LONGINES engraving and globe emblem in brushed steel

Authorized Dealer. Longines official 5 year warranty included

Longines

HydroConquest 42mm - Black on Bracelet

$2,200
Longines
$2,200

HydroConquest 42mm - Black on Bracelet

The Details

  • 42 mm

    Case Size

  • 11.7 mm

    Case Height

  • 51.2 mm

    Lug to Lug

  • 300m

    Water Resistance

Overview

Case Height

11.7 mm

Case Size

42 mm

Collection

Conquest

Style

Diver

Lug to Lug

51.2 mm

Lug Width

21 mm

Movement

Automatic

Reference

L3.788.4.56.6

Release Date

2026-03-26

Subcollection

HydroConquest

Water Resistance

300m

Case

Bezel

Black, unidirectional rotating bezel, count up scale, featuring a SuperLumiNova® filled capsule on the triangle at time “0”

Caseback

Brushed screw-down case back, with planisphere and Longines logo engraving

Case Material

stainless steel

Clasp / Buckle

Double-folding safety clasp, push-piece opening mechanism; micro-adjustment

Crown

Screw-in crown

Crystal

Sapphire crystal with multi-layer anti-reflective coating on both sides

Dial Color

Black

Dial Features

Lacquered polished, 11 applied rhodium-plated indexes with Super-LumiNova® treatment, date aperture at 3 o’clock

Hands

Rhodium-plated and polished, with Super-LumiNova® treatment

Lume

Super-LumiNova® treatment on hands and indexes

Strap / Bracelet Material

stainless steel bracelet

Movement

Caliber

L888.5

Features

Resistant to magnetic fields (ISO 764), with silicon balance-spring, 111⁄2 lines

Functions

Hours, minutes, seconds, date

Jewels

21 Jewels

Movement

Self-winding mechanical movement

Power Reserve

72 Hours

Vibrations Per Hour

25,200 vph

Complication

Date

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About Longines

Elegance Is An Attitude

With roots tracing back to 1832, Longines today is one of the largest and most storied Swiss watch manufacturers, with a diverse collection that balances mass appealing modern watches with heritage-inspired pieces directed toward the enthusiast market. With Longines located under the Swatch Group umbrella alongside ETA, the brand has unique access to a number of specialized calibers while also offering more competitive price points compared to many other Swiss luxury watchmakers on the market.

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