Longines HydroConquest Hydroconquest Chronograph Tachymeter
Reference L3.651.4.16.6
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.
Buy Now on Jomashop
This is an affiliate link
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
![[WTS] Longines HydroConquest 42mm](https://preview.redd.it/lexhgnkwaj3h1.jpg?width=640&crop=smart&auto=webp&s=a86b0779eb73daec310429b4bf9a275548eb95f9)
Longines HydroConquest 42mm
This listing is for a brand new Longines HydroConquest 42mm blue dial watch, featuring a ceramic bezel and quick micro adjust bracelet.
- Condition: Brand New In Box (BNIB)
- Diameter: 42mm
- Material: ceramic and lacquered
![[WTS] Longines Hydroconquest 43mm -Like New](https://preview.redd.it/mbobopeezc3h1.jpg?width=640&crop=smart&auto=webp&s=d76e8e2b7cb2e36112f424a86ddc9374602b03f2)
Longines Hydroconquest 43mm -Like New
This Longines Hydroconquest is a 43mm watch with a black dial, purchased new in April and still in fantastic condition.
- Condition: Like New
- Case size: 43mm
- Lug to lug length: 53
- Thickness: 11.90mm
![[WTS] Longines Hydroconquest 41mm - Black Dial](https://preview.redd.it/hhhqkjke053h1.jpg?width=640&crop=smart&auto=webp&s=8d30f8a05d7c9889f2d6cd40426e9121508375cc)
Longines Hydroconquest 41mm - Black Dial
A Longines Hydroconquest 41mm Automatic watch with a black dial, stainless steel case, and ceramic bezel.
- Condition: Good condition, minor scratches/scuffs in sapphire and minimal wear marks on bracelet and clasp
- Case size: 41mm diameter
- Bezel material: stainless steel and ceramic
- Bracelet type: original bracelet (and links)
![[WTS] Longines Hydroconquest Chronograph 41 Ref. L3.783.4 – Travel Box & Manual | $1,750](https://preview.redd.it/q8y1luj4743h1.jpg?width=640&crop=smart&auto=webp&s=bf073f3c5aab40974abcbb809d5655c3248d1a4a)
Longines Hydroconquest Chronograph 41 Ref. L3.783.4 – Travel Box & Manual | $1,750
The Longines Hydroconquest Chronograph 41 is a high-performance Swiss diver's watch featuring a blue ceramic bezel and screw-down crown, powered by the L688.2 column-wheel chronograph movement with a 54-hour power reserve.
- Condition: Very good with minor usage marks
- Movement: Longines L688.2, automatic column wheel chronograph with 27 jewels, 28,800 bph, and a 54-hour power reserve
- Case size: 41mm diameter
- Thickness: 15.6mm
![[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