Longines HydroConquest Hydroconquest Chronograph
Reference L3.644.4.56.6
About this watch
The Longines Hydroconquest Chronograph L3.644.4.56.6 is a stunning combination of style, functionality, and reliability. With its robust build, it promises durability while ensuring that you look good whether you鈥檙e at the beach or in a boardroom meeting. The case is made from high-quality stainless steel, creating a balanced presence on the wrist. The black dial features mixed indexes providing a sporty vibe while ensuring easy readability. The chronograph sub-dials are well-placed, making it simple to track time in various ways. At the core of this watch is the renowned ETA caliber 7750 automatic movement, celebrated for its reliability and precision. The sapphire glass ensures that the watch remains clear and legible no matter the conditions you put it through. With a water resistance rating of 300 meters, the Hydroconquest Chronograph is more than just a pretty face; it's a true diving companion.
Buy Now on Jomashop
This is an affiliate link
Key Features
- 41mm diameter stainless steel case
- Sapphire glass for scratch resistance
- Renowned ETA caliber 7750 automatic movement
- Chronograph feature with easy-to-read sub-dials
- Water resistance of up to 300 meters
- Robust and durable design
- Proprietary hands for a unique touch
Specifications
- Brand
- Longines
- Family
- HydroConquest
- Model
- Hydroconquest Chronograph
- Reference
- L3.644.4.56.6
- Movement
- 7750
- Movement Features
-
- Hours, Minutes, Small Seconds
- Date, Day
- Chronograph
- Case
- Stainless Steel 41mm
- Dial Color
- Black
- Crystal
- Sapphire
- Water Resistance
- 300
Current Listings
![[WTS] Longines Hydroconquest Commonwealth 39mm BNIB](https://preview.redd.it/a2jxqocxcs0h1.jpg?width=640&crop=smart&auto=webp&s=7b7233ec860a3479214a3cbe41aa61b5074a75c8)
Longines Hydroconquest Commonwealth 39mm BNIB
The Longines Hydroconquest Commonwealth is a limited edition watch from 2026, available in 39mm size. It comes with inner and outer boxes, tags, papers, and warranty.
- Condition: Brand New In Box (BNIB)
- Case size: 39mm
- Limited edition: 2026
![[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
![[WTS] Longines Hydroconquest Quartz Two Tone L3.740.3.56.7 - $600 馃殺](https://preview.redd.it/mjmjn7gaemzg1.jpg?width=640&crop=smart&auto=webp&s=40f67ac5acf667b2aa39f94a12de36a7ca27326f)
Longines Hydroconquest Quartz Two Tone L3.740.3.56.7 - $600 馃殺
This Longines Hydroconquest is a 41mm two-tone diver's watch with a quartz movement.
- Condition: Used with light scratches
- Size: 41mm diameter