Longines HydroConquest Hydroconquest Chronograph Tachymeter Black
Reference L3.651.4.56.6
About this watch
The Longines HydroConquest Chronograph Tachymeter Black is a testament to the brand's dedication to creating timepieces that combine functionality, style, and durability. Its striking black dial exudes a sporty yet sophisticated vibe, making it a versatile option for both casual outings and formal events. The watch features a robust movement based on the ETA/Valjoux 7750, boasting a 42-hour power reserve and a frequency of 28,800 vibrations per hour. With its impressive water resistance of 300 meters and sapphire glass protection, this watch is designed to withstand underwater activities while remaining stylish enough for everyday wear. The stainless steel bracelet adds to its luxurious feel, ensuring comfort throughout the day. Whether you're deep-sea diving or just going about your day, you can trust this watch to keep you on schedule. With a diameter of 41.00 mm, it strikes a balance between being prominent on the wrist without feeling bulky.
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Key Features
- Longines caliber L667 automatic movement
- 300m water resistance with sapphire glass protection
- Stainless steel case with rotating dive bezel
- Black dial with stick and dot indexes
- Chronograph function with three sub-dials
- 42-hour power reserve and 28,800 vibrations per hour
- 41.00 mm diameter and 21.00 mm lug width
Specifications
- Brand
- Longines
- Family
- HydroConquest
- Model
- Hydroconquest Chronograph Tachymeter Black
- Reference
- L3.651.4.56.6
- Movement
- l667
- Movement Features
-
- Hours, Minutes, Small Seconds
- Date
- Chronograph
- Case
- Stainless Steel 41mm
- Dial Color
- Black
- Crystal
- Sapphire
- Water Resistance
- 300
Current Listings
![[WTS] Longines Hydroconquest 39mm L3.779.4.96.6](https://preview.redd.it/zub5je7bs71h1.jpg?width=640&crop=smart&auto=webp&s=c13e2690b5c678b496a1014ea9a0e708206ff81c)
Longines Hydroconquest 39mm L3.779.4.96.6
A Longines Hydroconquest 39mm with a frosted blue dial, this watch features a unique and stylish design.
- Condition: Like new
- Size: 39mm diameter
![[WTS] Longines Hydroconquest 39mm](https://preview.redd.it/j0qiwnh0r71h1.jpeg?auto=webp&s=149e7e806f9c75a04bd76edd823cd16d02223f52)
Longines Hydroconquest 39mm
A Longines Hydroconquest diver's watch in excellent condition, featuring a 2026 movement and virtually no signs of wear.
- Condition: 9.6/10 - extremely clean example
- Movement: 2026
- Case condition: virtually no signs of wear
- Box included: true
![[WTS] Longines Hydroconquest 39mm Limited Edition Commonwealth Games Mint](https://preview.redd.it/nl26c159pr0h1.jpg?width=640&crop=smart&auto=webp&s=39aff2e3e4e52101bb87e437d2067e0379d65704)
Longines Hydroconquest 39mm Limited Edition Commonwealth Games Mint
A limited edition Longines Hydroconquest, purchased just a week ago and still under warranty.
- Condition: Mint
- Case Size: 39mm
- Limited Edition Quantity: 2026 pieces
- Warranty Length: five years
![[WTS] Longines HydroConquest 39mm Automatic Black Ceramic Bezel + Bracelet + WOE NATO - $750](https://preview.redd.it/p69ddyorlr0h1.jpg?width=640&crop=smart&auto=webp&s=f7815d2daaf928def1c1cbf186377f9a75330779)
Longines HydroConquest 39mm Automatic Black Ceramic Bezel + Bracelet + WOE NATO - $750
This Longines HydroConquest is an excellent daily-wear diver with great proportions and comfortable sizing, featuring a black dial and ceramic bezel. The watch is running well and keeping great time.
- Condition: Excellent daily-wear, shows wear from use on the bracelet
- Case Size: 39mm diameter
- Bracelet Type: black ceramic bezel + bracelet + WOE NATO
![[WTS] Longines Hydroconquest Quartz Two Tone L3.740.3.56.7 - $600 馃殺](https://preview.redd.it/rp8zbzy4sd0h1.jpg?width=640&crop=smart&auto=webp&s=21116ff5110f1b74d4b7bda264317dfe55f99585)
Longines Hydroconquest Quartz Two Tone L3.740.3.56.7 - $600 馃殺
A quartz-powered diver's watch from Longines, featuring a black dial and two-tone yellow gold PVD finish on the 41mm case.
- Condition: Good (light scratches)
- Case size: 41mm
- Material: two tone yellow gold PVD
- Movement: quartz
![[WTS] Longines Hydroconquest 43mm (updated pictures)](https://preview.redd.it/11p4qnon560h1.jpg?width=640&crop=smart&auto=webp&s=3d165c7cb611511155a69847f097a14536111e8c)
Longines Hydroconquest 43mm (updated pictures)
This Longines Hydroconquest 43mm features a black dial on a stainless steel bracelet and has been worn only 4-6 times since its purchase. It comes with a full set, including the box, tags, warranty cards, and is still under Jomashop's 2-year warranty.
- Condition: Fantastic, worn 4-6 times
- Case size: 43mm
- Lug to lug: 53mm
- Thickness: 11.90mm
![[WTS] (brand new) Longines HydroConquest 39mm - $1800 shipped](https://preview.redd.it/hhn5x9gi950h1.jpg?width=640&crop=smart&auto=webp&s=127fbc96289090a876136eae3e19a3201923e901)
(brand new) Longines HydroConquest 39mm - $1800 shipped
This brand new Longines HydroConquest features a black dial, stainless steel case and bracelet, sapphire crystal with anti-reflective coating, and is powered by the L888.4 automatic movement.
- Condition: Unworn
- Case material: stainless steel
- Bracelet material: stainless steel
- Water resistance: 300m
![[WTS] 2026 Longines HydroConquest 39mm - Black Ceramic - Newest Release - Full Set](https://preview.redd.it/xz7b44mm8tzg1.jpg?width=640&crop=smart&auto=webp&s=b3daf2f6a5742e16f2a308812d6febe2533806d7)
2026 Longines HydroConquest 39mm - Black Ceramic - Newest Release - Full Set
The newly redesigned Longines HydroConquest in the highly sought-after 39mm size, featuring a refined dial and upgraded bracelet.
- Condition: Excellent Used Condition
- Size: 39mm diameter
- Thickness: ~11.9mm
- Lug-to-lug length: 47mm
![[WTS] Longines Hydroconquest 43mm L3.782.4.56.6-3 weeks owned.](https://preview.redd.it/q87s2169hozg1.jpg?width=640&crop=smart&auto=webp&s=ea163d3c8d0e0ecac6b09e09c73bf296af8af1fb)
Longines Hydroconquest 43mm L3.782.4.56.6-3 weeks owned.
A Longines Hydroconquest 43mm watch on a black dial with a stainless steel bracelet, now on an Ali Rubber strap.
- Condition: Mint condition, worn approximately 5 times
- Case size: 43mm diameter
- Lug to lug: 53mm
- Thickness: 11.90mm