Longines HydroConquest Hydroconquest Chronograph Tachymeter Blue

Reference L3.651.4.96.6

Longines Hydroconquest Chronograph Tachymeter Blue

About this watch

The Longines HydroConquest L3.651.4.96.6 is a luxury watch that exudes sporty elegance, perfect for divers and watch enthusiasts alike. Its striking blue dial and sturdy stainless steel case make it a standout timepiece. The watch boasts an impressive water resistance of up to 300 meters, ensuring it can withstand the rigors of daily wear and tear. Powered by Longines' caliber L667, this automatic movement offers a reliable chronograph function and 42-hour power reserve. With its versatile design suitable for various occasions, this watch is not just a timepiece but a statement piece. Whether you're in the office or out diving, the HydroConquest fits snugly on the wrist with its adjustable stainless steel bracelet.

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Key Features

Stunning blue dial
Water resistance up to 300 meters
Reliable automatic movement
Chronograph functionality
Scratch-resistant sapphire glass
Versatile design
Adjustable stainless steel bracelet

Specifications

Brand

Longines

Family

HydroConquest

Model

Hydroconquest Chronograph Tachymeter Blue

Reference

L3.651.4.96.6

Movement

l667

Movement Features

Hours, Minutes, Small Seconds
Date
Chronograph

Case

Stainless Steel 41mm

Dial Color

Blue

Crystal

Sapphire

Water Resistance

300

Current Listings

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

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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

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View listing on r/WatchExchange

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

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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

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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

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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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View listing on RolexForums