Longines HydroConquest Hydroconquest Chronograph L688

Reference L3.696.4.53.6

About this watch

The Longines Hydroconquest Chronograph L688 is a statement piece that combines elegance with functionality. This robust diving watch features a stunning black dial, Arabic numeral indexes, and a rotating bezel for precise timing. Its 300-meter water resistance makes it perfect for underwater escapades. The automatic movement, powered by a column wheel chronograph system, ensures smooth and accurate operation. With a 54-hour power reserve, you can wear this watch without worrying about winding it every day. The stainless steel case is durable and polished, making it suitable for both formal events and casual wear. This watch is an investment that combines style, functionality, and heritage. Its rich history, impeccable craftsmanship, and versatile design make it a must-have for anyone who appreciates quality timepieces.

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Key Features

Automatic movement with 54-hour power reserve
300-meter water resistance for diving
Chronograph function for precise timing
Stainless steel case with polished finish
Rotating bezel for tracking elapsed time
Black dial with Arabic numeral indexes

Specifications

Brand

Longines

Family

HydroConquest

Model

Hydroconquest Chronograph L688

Reference

L3.696.4.53.6

Movement

l688-2

Movement Features

Hours, Minutes, Small Seconds
Date
Chronograph, Column wheel

Case

Stainless Steel 41mm

Dial Color

Black

Water Resistance

300

Current Listings

Longines Hydroconquest 43mm - $950

Longines - Hydroconquest 43mm · $950

This Longines HydroConquest 43mm is in excellent working order and comes with a WatchMaxx full kit.

Condition: Great condition
Depth rating: 200m

Posted at

Aug 21, 2025, 12:02 AM

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Longines HydroConquest Ref. L3.780.3 – Two-Tone Steel & Rose Gold PVD – 39mm Automatic Diver – $999 Shipped

Longines - L3.780.3 · $999

a Longines HydroConquest Ref. L3.780.3, a Two-Tone Steel & Rose Gold PVD automatic diver watch with a 39mm case size.

Case Material: steel and rose gold PVD
Water Resistance: 39mm diameter

Posted at

Aug 18, 2025, 9:52 PM

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Longines Hydroconquest Automatic 41MM - Green Ceramic Bezel

Longines - L3.781.4.05.2 · $1,240

This Longines HydroConquest features a green ceramic bezel, automatic movement with date display, and a power reserve of up to 72 hours.

Condition: Like new/never worn
Case size: 41mm diameter
Water resistance: 30 bar
Crystal material: scratch-resistant sapphire crystal

Posted at

Aug 18, 2025, 7:39 PM

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For Sale – Longines HydroConquest Automatic (Ref. L3.649.4, Navy Dial) – €600 ONO Automatic 41mm with the navy blue dial.

Posted at

Aug 16, 2025, 7:17 AM

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Longines Hydroconquest Quartz 39mm - Very good condition - $500 shipped in US

Posted at

Aug 14, 2025, 7:47 PM

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Longines Hydroconquest GMT Black 41mm - Full set with extras $1850

Longines - Hydroconquest GMT Black 41mm · $1,850

41mm Longines Hydroconquest GMT with full set of extras, including OEM rubber strap and two additional straps.

Condition: Excellent
Case size: 41mm
Included extras: Longines black rubber strap, Longines style leather strap, orange cut-to-size strap

Posted at

Aug 11, 2025, 4:30 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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