Longines HydroConquest Hydroconquest Chronograph Tachymeter

Reference L3.651.4.16.6

Longines Hydroconquest Chronograph Tachymeter

About this watch

The Longines HydroConquest L3.651.4.16.6 is a robust and stylish diver's watch that combines performance with elegance. Its 41mm stainless steel case features a rotating bezel, marked from 0 to 60, for precise timing underwater. The sapphire crystal glass is scratch-resistant and adds to the watch's durability. A closed case back limits visibility of the movement but adds to the watch's sturdiness. With a lug width of 21mm, the Hydroconquest comes with a well-crafted stainless steel bracelet that feels solid yet comfortable on the wrist. The chronograph feature is a highlight, providing additional functionality for timing events. The date function ensures you're always on top of your schedule. Whether diving or just out for a casual lunch, this watch feels right at home. Its impressive 300m water resistance makes it a reliable companion for underwater adventures. With a reliable and accurate automatic movement, the Hydroconquest keeps time with impressive accuracy. A power reserve of 42 hours ensures you can take it off for a day or two without worrying about winding it again. The Longines HydroConquest is more than just a watch; it's a statement piece that combines performance with elegance.

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Key Features

Longines caliber L667 automatic movement
41mm stainless steel case with rotating bezel
Sapphire crystal glass for scratch-resistance and durability
300m water resistance for underwater adventures
Chronograph feature for timing events
Date function for scheduling
42-hour power reserve for reliability

Specifications

Brand

Longines

Family

HydroConquest

Model

Hydroconquest Chronograph Tachymeter

Reference

L3.651.4.16.6

Movement

l667

Movement Features

Hours, Minutes, Small Seconds
Date
Chronograph

Case

Stainless Steel 41mm

Dial Color

White

Crystal

Sapphire

Water Resistance

300

Current Listings

Longines Hydroconquest 39mm Black MINT

Longines - Hydroconquest 39mm Black · $2,100

A Longines Hydroconquest 39mm in black, described as 'SUPER SUPER SUPER watch' with a comfortable bracelet and excellent bezel action.

Condition: MINT, basically new
Bracelet length: Super comfortable
Bezel action: Great

Posted at

Apr 28, 2026, 9:37 PM

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Longines HydroConquest Green Dial Two Tone $1350 41mm

Longines - HydroConquest · $1,350

This Longines HydroConquest features a green dial and two-tone design.

Posted at

Apr 28, 2026, 9:41 AM

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View listing on r/WatchExchange

Longines HydroConquest 43mm

Longines - HydroConquest 43mm · $800

A Longines HydroConquest 43mm diver watch for sale, with excellent timekeeping and minimal signs of wear.

Condition: Pre-owned with normal wear
Bracelet condition: normal wear with worn clasp
Case condition: scratch-free except on the back
Papers included: true

Posted at

Apr 27, 2026, 9:05 PM

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Longines HydroConquest 42mm Blue Ceramic Bezel – 2026 Card – Full Kit – Like New

Longines - 2026 · $4,200

The listing is for a Longines HydroConquest 42mm watch with a blue ceramic bezel, accompanied by a full kit and a 2026 card.

Condition: Like new
Material: Blue Ceramic Bezel
Size: 42mm

Posted at

Apr 27, 2026, 1:18 PM

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Longines HydroConquest 39mm 2026 Commonwealth Games Limited Edition

Longines - HydroConquest 39mm 2026 Commonwealth Games Limited Edition · $3,595

This is a brand new, unworn Longines HydroConquest limited edition watch from the 2026 Commonwealth Games collection. It features a 39mm case and comes with various accessories.

Condition: Brand New Unworn
Case size: 39mm
Limited edition status: One of 2026

Posted at

Apr 27, 2026, 11:58 AM

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View listing on r/WatchExchange