Longines HydroConquest Hydroconquest Chronograph
Reference L3.644.4.56.2
About this watch
The Longines Hydroconquest Chronograph (Model L3.644.4.56.2) is a stunning piece that combines sophistication with robust functionality. Founded in 1832, Longines has a rich heritage in watchmaking that spans nearly two centuries. The Hydroconquest line is designed for those who appreciate both style and performance. This timepiece is powered by the revered ETA 7750 movement, an automatic movement providing reliable and accurate timekeeping experience with a frequency of 28,800 vibrations per hour and a power reserve of 42 hours. The watch features a gem-set bezel, stainless steel case with a water resistance of up to 300 meters, and a black dial with mixed indexes for high visibility. The proprietary hands are designed for readability, ensuring quick time-telling in low-light conditions. With its impressive water resistance and robust chronograph functionality, this watch is perfect for divers, snorkelers, and anyone who appreciates luxury and performance.
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Key Features
- ETA 7750 automatic movement
- Water resistance up to 300 meters
- Gem-set bezel
- Stainless steel case
- Black dial with mixed indexes
- Proprietary hands for readability
- Robust chronograph functionality
Specifications
- Brand
- Longines
- Family
- HydroConquest
- Model
- Hydroconquest Chronograph
- Reference
- L3.644.4.56.2
- 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 43mm - $950](https://preview.redd.it/m6h351h3rakf1.jpeg?auto=webp&s=dfc716611f308698339168c18739a540541089cb)
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
![[WTS] Longines HydroConquest Ref. L3.780.3 – Two-Tone Steel & Rose Gold PVD – 39mm Automatic Diver – $999 Shipped](https://preview.redd.it/mxbo2ro1uvjf1.jpg?width=640&crop=smart&auto=webp&s=3b99c94fd0d84eb7a8054e7ed6c085dbf2acccde)
Longines HydroConquest Ref. L3.780.3 – Two-Tone Steel & Rose Gold PVD – 39mm Automatic Diver – $999 Shipped
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
![[WTS] Longines Hydroconquest Automatic 41MM - Green Ceramic Bezel](https://preview.redd.it/byuqh6i86vjf1.jpg?width=640&crop=smart&auto=webp&s=710b313c8aa5dbbc4ad604a45dc3c95d7dd925ab)
Longines Hydroconquest Automatic 41MM - Green Ceramic Bezel
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
![[WTS] For Sale – Longines HydroConquest Automatic (Ref. L3.649.4, Navy Dial) – €600 ONO Automatic 41mm with the navy blue dial.](https://preview.redd.it/2ly9oiu08djf1.jpg?width=640&crop=smart&auto=webp&s=94ce276e3e84139ce0c03f98ebb47c589b72f336)
![[WTS] Longines Hydroconquest Quartz 39mm - Very good condition - $500 shipped in US](https://preview.redd.it/ejmuo0hzn2jf1.jpg?width=640&crop=smart&auto=webp&s=503b2a27e4bbbd773cfd4a27b063e5c8c3c7def3)
![[WTS] Longines Hydroconquest GMT Black 41mm - Full set with extras $1850](https://preview.redd.it/pv3gnpd7agif1.jpg?width=640&crop=smart&auto=webp&s=69945eaad0d34b2f130def6d489e31cb18563521)
Longines Hydroconquest GMT Black 41mm - Full set with extras $1850
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

Longines HydroConquest, L3.781.4.06.9, Steel Diver, Olive, Excellent Condition.
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