Longines HydroConquest Hydroconquest Automatic 39 Black
Reference L3.641.4.56.6
About this watch
The Longines Hydroconquest Automatic 39 Black is a testament to the perfect fusion of functionality and sophistication, designed for both adventure and elegance. With its stunning black dial and striking stick and dot indexes, it offers a beautiful contrast that catches the light beautifully. The 39mm stainless steel case strikes a perfect balance between robust and refined, making it comfortable for everyday wear while still being tough enough for underwater adventures. At the core of this timepiece lies the Longines caliber L633.5, an automatic movement based on the renowned ETA 2824-2. This movement is celebrated for its reliability and accuracy, ensuring precise timekeeping with a frequency of 28,800 vibrations per hour. The Hydroconquest boasts a power reserve of approximately 38 hours, making it ideal for everyday wear. With a water resistance rating of 300 meters, this watch is designed to handle the pressure of aquatic activities. Its rotating bezel with a 0-60 scale allows you to track elapsed time underwater, ensuring your safety while looking incredibly stylish.
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Key Features
- 39mm stainless steel case
- Longines caliber L633.5 automatic movement
- Sapphire crystal glass for scratch resistance
- 300m water resistance
- Rotating 0-60 bezel for dive tracking
- Stainless steel bracelet with adjustable clasp
Specifications
- Brand
- Longines
- Family
- HydroConquest
- Model
- Hydroconquest Automatic 39 Black
- Reference
- L3.641.4.56.6
- Movement
- l633-5
- Movement Features
-
- Hours, Minutes, Seconds
- Date
- Case
- Stainless Steel 39mm
- Dial Color
- Black
- Crystal
- Sapphire
- Water Resistance
- 300
Current Listings
![[WTS] Longines HydroConquest 44mm Black Dial Automatic](https://preview.redd.it/4ggkzf0wkr2h1.jpg?width=640&crop=smart&auto=webp&s=178caa572e68475e5146c103572fd0766aa2f2ef)
Longines HydroConquest 44mm Black Dial Automatic
Classic everyday dive watch with a clean black dial, automatic movement and 300m water resistance, perfect for daily wear.
- Condition: Good overall
- Case size: 44mm
- Movement type: Automatic
- Bezel material: Aluminum
![[WTS] Longines Hydroconquest 43mm](https://preview.redd.it/6gb1epj8yq2h1.jpg?width=640&crop=smart&auto=webp&s=7d7fd5691e645b024aa1a049b0c21e598e5b65b2)
Longines Hydroconquest 43mm
The watch is a Longines Hydroconquest model L3.782.4.56.6 with a black dial and a 43mm case size.
- Condition: Brand new with minor use (about a month)
- Case size: 43mm diameter
- Lug to lug length: 53mm
- Thickness: 11.90mm
![[WTS] (brand new) Longines HydroConquest 39mm - $1700 shipped](https://preview.redd.it/td2bjuhwxk2h1.jpg?width=640&crop=smart&auto=webp&s=1347131218519237b78443a9672b63095aa7c867)
(brand new) Longines HydroConquest 39mm - $1700 shipped
This brand new Longines HydroConquest features a 39mm stainless steel case with black dial and ceramic bezel insert, along with a date display at the 3 o'clock position.
- Condition: Unworn
- Case material: stainless steel
- Bracelet material: stainless steel
- Water resistance: 300m
![[WTS] Longines hydroconquest 39 mm green](https://preview.redd.it/rq8wp29fwh2h1.jpg?width=640&crop=smart&auto=webp&s=da5b8da736fbc2099069247138e97a16996477e9)
Longines hydroconquest 39 mm green
This Longines HydroConquest is a recent purchase from a US authorized dealer, still in its original packaging and with all papers.
- Condition: great condition
- Bracelet condition: has a small ding on the clasp
- Box and paper status: all included
- Additional strap type: aftermarket rubber
![[WTS] Longines HydroConquest 39mm Blue – Full Set – Excellent Condition](https://preview.redd.it/d8we6u297g2h1.jpg?width=640&crop=smart&auto=webp&s=38b6e51237898ed419c7d1cc262fdabc212980b9)
Longines HydroConquest 39mm Blue – Full Set – Excellent Condition
This Longines HydroConquest is a 39mm watch with an automatic movement and ceramic bezel, featuring a blue dial and bezel.
- Condition: Excellent Condition
- Case size: 39mm diameter
![[WTS] RARE CONFIGURATION Longines HydroConquest 42mm | 2026 Gen | Green Ceramic | Green Lacquered Dial | Ref. L3.788.4.06.6 | Never Worn | Full Kit | Warranty Card 5/8/26](https://preview.redd.it/fd515t9kkc2h1.jpg?width=640&crop=smart&auto=webp&s=af7f902dfe994efb689e4262712035c47d009802)
RARE CONFIGURATION Longines HydroConquest 42mm | 2026 Gen | Green Ceramic | Green Lacquered Dial | Ref. L3.788.4.06.6 | Never Worn | Full Kit | Warranty Card 5/8/26
This is a rare configuration Longines HydroConquest 42mm watch with a green ceramic bezel and a green lacquered dial. It features an automatic movement, 300m water resistance, and a full kit including the original box, papers, and warranty card.
- Condition: never worn
- Bracelet: upgraded Longines mesh style bracelet
- Movement: Calibre L888.5, automatic, silicon balance spring, 72hr power reserve
- Water Resistance: 300m / 30 bar
![[WTS] Longines Hydroconquest 39mm black bezel - 2026 release](https://preview.redd.it/dzaj40g6hy1h1.jpg?width=640&crop=smart&auto=webp&s=e0c4109dad4c105e423f52606ae0c699f43b8b83)
Longines Hydroconquest 39mm black bezel - 2026 release
A 39mm black bezel Longines Hydroconquest with a black dial, sold in full kit and unregistered for warranty purposes.
- Condition: Like-new
- Case diameter: 39mm
- Condition notes: No scratches anywhere on the case, crystal or bracelet
![[WTS] Longines Hydroconquest Quartz Two Tone L3.740.3.56.7 - $550](https://preview.redd.it/q20m9xof6p1h1.jpg?width=640&crop=smart&auto=webp&s=64fde65853d57c300e741bf001e1d758a57af2f2)
Longines Hydroconquest Quartz Two Tone L3.740.3.56.7 - $550
A Longines Hydroconquest quartz two-tone diver watch, featuring a black dial and 41mm case size.
- Condition: Pre-owned with light scratches
- Case size: 41mm
- Material: two tone
![[WTS] Longines Hydroconquest Quartz Two Tone L3.740.3.56.7 - $550](https://preview.redd.it/xctcalo9zk1h1.jpg?width=640&crop=smart&auto=webp&s=650ef270e5e02acf60bc86c32f9eda97d9f00f45)
Longines Hydroconquest Quartz Two Tone L3.740.3.56.7 - $550
This Longines Hydroconquest is a fun and capable diver that comes in the 41mm version, featuring a black dial and quartz movement.
- Condition: pre-owned with light scratches
- Case Size: 41mm
- Movement Type: quartz