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 41mm](https://external-preview.redd.it/gV1UVE_Cfj0p9G8IHrtNEhGnDKekTR0dsehjKb-xSBQ.jpeg?auto=webp&s=aef039e8455d0ad90034c67c96e71d7915588671)
Longines HydroConquest 41mm
A Longines HydroConquest 41mm watch with a blue sunburst dial, featuring a clean crystal and flawless dial.
- Condition: Excellent pre-owned condition
- Diameter: 41mm
![[WTS] Longines Hydroconquest Chronograph 41 Ref. L3.783.4 – Travel Box & Manual | $1,900](https://preview.redd.it/xq67uwuvhdvg1.jpg?width=640&crop=smart&auto=webp&s=b1b608ae8ff423df941f0594467244ac1d6a5780)
Longines Hydroconquest Chronograph 41 Ref. L3.783.4 – Travel Box & Manual | $1,900
This Longines Hydroconquest Chronograph is a high-performance Swiss diver's watch featuring a blue ceramic bezel and screw-down crown, powered by the calibre L688.2 column-wheel chronograph movement with a 54-hour power reserve.
- Condition: Very good with minor usage marks
- Case Size: 41mm x 51mm stainless steel case, 15.6mm thickness, 21mm lug width
- Movement: Longines L688.2 automatic column wheel chronograph with 27 jewels, 28,800 bph, and a 54-hour power reserve
- Water Resistance: 300m (30 ATM)
![[WTS] Longines HydroConquest GMT Black. Ref: L3.790.4.56.6 (2025) Complete. $1,950](https://preview.redd.it/4we6iz8pe9vg1.jpg?width=640&crop=smart&auto=webp&s=9766afde46f63ad54eb826266f2690ad5ac402f9)
Longines HydroConquest GMT Black. Ref: L3.790.4.56.6 (2025) Complete. $1,950
This Longines HydroConquest GMT Black is a modern dive watch with excellent everyday wearability, offering both tool watch functionality and travel convenience.
- Condition: Excellent pre-owned
- Case size: 41mm diameter
- Water resistance: 300m
![[WTS] (Longines) (2026 Hydroconquest 42) Full 5 Year Warranty, LNIB](https://preview.redd.it/kzo89l4370vg1.jpg?width=640&crop=smart&auto=webp&s=04ed40cb783b2de9e048d862b02c55f2128f1b42)
(Longines) (2026 Hydroconquest 42) Full 5 Year Warranty, LNIB
This newly released Longines Hydroconquest is a large watch with exceptional fit and finish. It comes in its original packaging with a full kit and warranty.
- Condition: LNIB (Like New In Box)
- Case size: 42mm
- Water resistance: not specified
![[WTS] Longines Hydroconquest 43mm Full Black Ceramic Ref L3.784.4.56.9 MINT Full Kit $2500](https://preview.redd.it/5p9s2jfuggug1.jpg?width=640&crop=smart&auto=webp&s=5d1e0de609733b75cfc9f08cfa83b0e43cb60de0)
Longines Hydroconquest 43mm Full Black Ceramic Ref L3.784.4.56.9 MINT Full Kit $2500
This Longines HydroConquest features a unique full black ceramic aesthetic with a sleek and stealthy design, while maintaining refined and versatile qualities. The watch boasts excellent scratch resistance, legible dial, and comfortable daily wear.
- Condition: MINT
- Case diameter: 43mm
- Thickness: 13mm
- Lug-to-lug length: 56mm
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