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Longines HydroConquest 41 — L3.781.4.56.6

Longines

HydroConquest 41

L3.781.4.56.6

Longines' enduring dive companion, refined for the modern wrist.

Estimated market value
$1,200
Confidence: Moderate
Original retail: $1,900

An estimate from current market data — not an offer. Your actual value depends on condition, completeness, and authentication.

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Overview

The Longines HydroConquest 41 in reference L3.781.4.56.6 is a 41 mm stainless steel diver wearing a black sunray dial with luminous markers. It is powered by the in-house calibre L888, a self-winding movement that has become a cornerstone of Longines' contemporary sports-watch offering. The model sits within the long-running HydroConquest line, which represents the brand's dedicated approach to serious aquatic timekeeping.

History

The HydroConquest name has been part of Longines' catalogue for several decades, evolving through successive generations of case shapes, movements, and dial treatments. The current 41 mm generation, to which this reference belongs, was introduced in 2018 and brought a more contemporary silhouette alongside the COSC-grade calibre L888. The line occupies a considered position in the mid-tier Swiss diver segment, drawing collectors who value the combination of Saint-Imier heritage and reliable modern engineering. Its longevity in production reflects consistent demand across both enthusiast and general audiences.

Notable points

  • 41 mm stainless steel case offers a versatile fit suited to a wide range of wrist sizes.
  • Calibre L888 is a self-winding movement with a silicon balance spring, contributing to improved antimagnetic performance and long-term accuracy.
  • The black sunray dial creates a dynamic light-play effect while the applied luminous markers ensure legibility in low-visibility conditions.
  • The HydroConquest line carries dive-watch credentials including water resistance appropriate for recreational diving.
  • Reference L3.781.4.56.6 has remained in continuous production since 2018, reflecting the model's stable place in Longines' sports catalogue.

Specifications

Brand
Longines
Collection
HydroConquest
Reference
L3.781.4.56.6
Years of production
2018 – present
Case
41mm stainless steel
Case material
Stainless steel
Case diameter
41 mm
Movement
Cal. L888
Crystal
Sapphire
Dial
Black sunray, luminous markers
Bezel
Unidirectional ceramic dive bezel, black
Bracelet / strap
Steel bracelet
Water resistance
300 m
Power reserve
72 h
Complications
Date
Type
Diver
Worn as
Men's
Also known as
ハイドロコンクエスト, 康卡斯

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