Longines
Pre-Loved Longines HydroConquest
An accessible Swiss dive watch with a genuinely useful spec sheet
HydroConquest models are produced in large numbers and depreciate meaningfully once new, making pre-owned examples one of the more sensible entry points into Swiss dive-watch ownership. Longines' consistent build quality means condition varies more by care than by inherent fragility, so buyers can be selective without paying a large premium for near-new pieces.
Typical pre-owned
£539 – £1,438
In the edit
96 pieces
Sourcing
Authenticated · Ships to UK
The edit — 96 pieces
96 of 96 shown
Longines
Longines HydroConquest 39mm Watch Commonwealth Games 2026 Limited Edition
£2,015.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest GMT 41mm Blue Ceramic L3.790.4.96.9 Automatic Diver Watch
£1,934.50
From United Kingdom · Ships to UK
Longines
Longines HydroConquest GMT 41mm Blue | Full Set | Warranty to 2029
£1,849.99
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Chronograph L3.883.4.56.6 43mm case , ceramic bezel.
£1,791.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest 41mm GMT Brown Automatic 2025 - L3.790.4.66. - RRP £2,750
£1,750.00
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest 42mm 2026 - Black/Blue Mesh bracelet
£1,715.20
From United Kingdom · Ships to UK
Longines
Longines HydroConquest 39mm Automatic Black Dial Blue Bezel Date 300m Box
£1,664.20
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Men's Automatic Wristwatch 41mm Genuine Black Strap Boxed
£1,536.70
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest 42mm 2026 - Black/Grey Mesh bracelet
£1,525.00
From United Kingdom · Ships to UK
Longines
2023 PAPERS Longines Hydroconquest GMT Steel Black 41mm L3.790.4.56.6 Watch BOX
£1,370.68
From United States · Ships to UK
Longines
Longines HydroConquest Bi-Colour Blue Dial 41mm Full Set Automatic Men’s Watch
£1,150.00
From United Kingdom · Ships to UK
Longines
Unused LONGINES HydroConquest L3.781.3.98.9 Blue Automatic Men Watch in Box
£1,114.95
From Japan · Ships to UK
Longines
LONGINES HydroConquest Automatic Watch 41mm Blue L3.781.3.96.7 Gold Plated/S...
£1,074.26
From Japan · Ships to UK
Longines
Longines 2022 Commonwealth Games Ltd Edition Hydro conquest Divers Watch 41mm
£1,052.20
From United Kingdom · Ships to UK
Longines
Longines HydroConquest 47.5mm Automatic Chronograph Grey Dial - L3.665.4
£1,026.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Automatic 41mm Black Stainless L37824566 Full Set 2024
£1,026.70
From United Kingdom · Ships to UK
Longines
LONGINES HydroConquest L3.741.4.56.6 Automatic Mens Watch Near Mint A7233
£1,027.66
From Japan · Ships to UK
Longines
longines Men’s hydroconquest chronograph Stunning Condition Box And Papers
£2,046.70
From United Kingdom · Ships to UK
Longines
Fullset Longines Column Wheel Chronograph Automatic Black Men's Watch L2.750.4
£2,475.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest 39mm Blue Watch Pre-Owned
£2,345.86
From Japan · Ships to UK
Longines
2026 Longines Hydroconquest Auto 39mm L3.779.4.90.6 Full Set Warranty
£1,900.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest L3.742.3 Auto 300m 41mm Black Dial Two-Tone - FULL SET
£924.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Sunray Blue Men's Watch - L3.790.4.96.9
£919.60
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Automatic 41mm (Matte Green Dial) – L3.781.4.06.6
£900.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Men's Black Watch - L3.742.4.56.6
£899.20
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Blue Men's Watch - L3.781.4.96.6
£899.20
From United Kingdom · Ships to UK
Longines
Longines HydroConquest 41mm QTZ SS BLK Dial Mens Watch L3.740.3.56.7
£899.01
From United States · Ships to UK
Longines
Longines HydroConquest Sunray Blue Men's Watch - L3.841.4.96.6
£889.00
From United Kingdom · Ships to UK
Longines
Men’s Longines Hydroconquest - Blue Dial - 41mm
£873.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Silver quartz 41mm Men's 300m Diver Swiss Watch. superb
£872.68
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Men's Watch 41mm, Automatic, boxed, excellent
£861.10
From United Kingdom · Ships to UK
Longines
Longines HydroConquest 39mm Automatic L3.647.4 White Dial
£822.70
From United Kingdom · Ships to UK
Longines
Longines hydroconquest automatic " Commonwealth Games 2022 "
£1,638.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest L3.640.4 Swiss Rotating Bezel Blue Watch
£771.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest L3.651.4 41mm Auto Black Dial 300m Steel Bracelet
£708.46
From United Kingdom · Ships to UK
![[Box,Paper] Longines L3.740.4 Hydro Conquest 300M Automatic Black Dial Men Watch](https://i.ebayimg.com/images/g/Un8AAeSwxLNqUxxr/s-l1600.jpg)
Longines
[Box,Paper] Longines L3.740.4 Hydro Conquest 300M Automatic Black Dial Men Watch
£696.03
From Japan · Ships to UK
Longines
Longines HydroConquest 41mm Sunray Blue Men's Watch in Excellent Condition
£671.44
From United States · Ships to UK
Longines
Longines HydroConquest Quartz SS Black Dial Mens Watch Stunning Condition
£650.00
From United Kingdom · Ships to UK
Longines
Longines Hydro Conquest Chronograph Mens Watch Blue 300M Swiss Mans Wristwatches
£629.59
From United Kingdom · Ships to UK
![Vintage [N MINT] Longines Hydro Conquest L3.648.4 Automatic Date Men's Watch](https://i.ebayimg.com/images/g/kWQAAeSw9mxqURBx/s-l1600.jpg)
Longines
Vintage [N MINT] Longines Hydro Conquest L3.648.4 Automatic Date Men's Watch
£629.49
From Japan · Ships to UK
Longines
2019 longines hydroconquest 41mm Men’s Dark Green Dial And Bezel
£1,077.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Blue Men's Automatic Watch - L3.780.4.96.6
£1,250.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Men's Black Watch - L3.780.4.56.9 Full Set Box and Papers
£1,219.48
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Auto 41mm 300m Black Dial Steel Bracelet L3.742.4.56.6
£950.00
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest Ceramic Auto Gents Watch Sunray Grey Dial 43mm Full Set
£1,065.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest L3.742.3.56.7 Full Set 2018
£995.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Black Auto Watch- L3.781.4.56.9 Full Set Box and Papers
£945.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest XXII Commonwealth Games Limited Edition Watch
£940.00
From United Kingdom · Ships to UK
Longines
LONGINESMen's HYDROCONQUEST 41mm Automatic Grey Ceramic Bezel Watch
£924.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Grey - L3.781.3.78.9
£924.70
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest Black Divers Watch - RRP £1700
£873.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Quartz 44mm Watch
£869.99
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Green Automatic Men's Watch - L37814069
£833.46
From Australia · Ships to UK
Longines
Longines HydroConquest Men's Watch with Bracelet And Black Rubber Strap,Full Set
£822.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Black L3.741.4.56.6 Automatic Men's Watch 39mm
£800.00
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest Chronograph Automatic Watch Men’s Beautiful BOX& PAPERS
£797.20
From United Kingdom · Ships to UK
Longines
LONGINES HYDROCONQUEST, L3.642.4.56.6 41mm. AUTOMATIC. Great condition.
£771.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Automatic 41mm Black Rubber Men's Watch L3.781.3.56.9
£771.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest L3.840.4 Quartz 41mm 300m Black Dial/Bezel Date
£771.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Men's Diver's Watch Blue Dial, 300m, 2020, Box, L38404
£761.50
From United Kingdom · Ships to UK
Longines
LONGINES HydroConquest L3.673.4 Automatic Chronograph Date Swiss Made Mens Watch
£763.30
From Japan · Ships to UK
Longines
LONGINES HydroConquest Mens Automatic Mens Watch Blue And Gold
£750.00
From United Kingdom · Ships to UK
Longines
Men's LONGINES ' Hydro Conquest ' Swiss Watch; DATE; Cleaned +NEW Batt; Box
£746.20
From United Kingdom · Ships to UK
Longines
LONGINES HydroConquest L3.780.4 #125
£736.25
From Japan · Ships to UK
Longines
Longines Hydroconquest Ref.L3.6404 Rotating Bezel Blue Dial Swiss Watch-Box&Papr
£724.42
From Poland · Ships to UK
Longines
Longines HydroConquest Automatic 41mm Black Dial & Bezel | Full Set | L3.742.4
£720.69
From United Kingdom · Ships to UK
Longines
Longines Hydro Conquest L3.380 Dive Watch 300m
£710.00
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest L3.742.4.56.6 Black Dial Automatic Men's Watch 41mm
£694.54
From Japan · Ships to UK
Longines
LONGINES HydroConquest L3.673.4 Automatic Chronograph Date Swiss Men's Watch
£675.24
From Japan · Ships to UK
Longines
Longines Hydroconquest Automatic 41mm Mens Watch L3.742.4 -Full Set Box + Papers
£675.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Automatic 41mm L3.642.4 Black Dial Box Papers Bracelet
£669.70
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest GMT 41mm Automatic caliber L704 Ref L3.687.4. Men’s Watch
£639.95
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Chronograph L3.651.4 Automatic 42mm Black Dial 300M Watch
£617.75
From Japan · Ships to UK
Longines
Longines HydroConquest L3.376.4 Quartz Wrist 16.5cm Watch
£607.01
From Japan · Ships to UK
Longines
Longines HydroConquest Ceramic Watch L3.784.4
£1,995.70
From United Kingdom · Ships to UK
Longines
LONGINES HYDRO CONQUEST L3.247.4 DIAMOND DIAL MOP 30MM QUARTZ WATCH
£544.22
From Australia · Ships to UK
Longines
Longines Hydroconquest Mens Quartz Watch Dark blue Dial L3.634.4
£537.10
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest Two Tone 2011 Mens Watch
£532.00
From United Kingdom · Ships to UK
Longines
New Batt LONGINES Hydro Conquest L3.730.4 Blue Quartz Date Mens Watch 39mm JAPAN
£521.24
From Japan · Ships to UK
Longines
Men’s Longines HydroConquest Watch L3.740.04
£516.70
From United Kingdom · Ships to UK
Longines
LONGINES Hydro Conquest L3.640.4 Date black Dial Quartz Men's Watch_960275
£506.57
From Japan · Ships to UK
Longines
LONGINES Hydro Conquest L3.647.4 Date Silver Dial Quartz Men's Watch_954636
£506.57
From Japan · Ships to UK
Longines
Longines Hydro Conquest L3.247.4 Men's
£618.70
From United Kingdom · Ships to UK
Longines
Genuine Longines Hydroconquest GMT Steel Bracelet OEM L3.790.4 L600169186 W 21mm
£500.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest 47.5mm Automatic Chronograph Grey Dial - L3.665.4
£1,128.70
From United Kingdom · Ships to UK
Longines
LONGINES HydroConquest L3.781.4.56.6 Automatic Mens Watch Near Mint A7306
£1,086.39
From Japan · Ships to UK
Longines
Longines HydroConquest XL 47.5mm Automatic Chronograph Grey Dial - L3.665.4
£873.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest L3.742.3.56.7 41mm Auto Two-Tone Black Dial
£782.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest L3.781.4 Black Dial Men's Watch GZl1jllz
£1,404.78
From Japan · Ships to UK
Longines
Longines HydroConquest Green Men's Watch - L3.782.4.06.6
£924.70
From United Kingdom · Ships to UK
Longines
LONGINES Hydro Conquest L3.783.4.96.6 Chronograph Automatic Men's Watch_965234
£1,156.36
From Japan · Ships to UK
Longines
Longines Hydro Conquest 41mm Swiss Automatic Watch - b049400197973 chh.hh
£949.99
From United Kingdom · Ships to UK
Longines
Longines Hydro Conquest Quartz L3.740.3 Two Tone Quickset Date Watch - Full Set
£935.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest L3.840.4 Quartz 41mm 300m Black Dial/Bezel Date
£771.70
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest Ref.L3.6404 Rotating Bezel BlackDial Swiss Watch-Box&Papr
£724.42
From Poland · Ships to UK
Longines
LONGINES HydroConquest L3.695.4 Automatic 41mm Stainless Steel Watch
£792.35
From Japan · Ships to UK
Why the HydroConquest is iconic
Longines introduced the HydroConquest in 2007 as its dedicated dive-watch line, drawing on the brand's long diving-watch heritage dating back to earlier Legend Diver models. The collection is defined by its ceramic unidirectional bezel, ample water resistance and ETA-based automatic movements, offering serious dive-watch specification at a comparatively modest price point.
What to pay pre-owned
Pre-owned UK prices generally range from around £450 to £1,300, centred near £900 for a full-size steel model on a bracelet in good condition. Ceramic bezel models, GMT variants and complete box-and-papers examples sit toward the top; smaller case sizes, rubber straps or watches with bezel or crystal wear trade lower.
Sizes & variants
Cases run from around 39mm to 43mm, in steel, steel-and-gold or full gold-tone finishes, with GMT and chronograph variants alongside the standard three-hand model.
How to authenticate
- 1.Check the case-back and movement reference against Longines' model numbers, as HydroConquest specifications changed across generations.
- 2.Inspect the ceramic bezel insert for chips or fading and confirm the bezel action clicks firmly with no play.
- 3.Verify the Longines winged-hourglass logo print quality on the dial and confirm any accompanying box, warranty card and links match the model.
Guidance only — always buy from sellers offering an authentication guarantee.
Buying a pre-owned Longines HydroConquest — FAQs
Is the HydroConquest a genuine dive watch?
Yes, it meets ISO dive-watch standards with a unidirectional bezel and water resistance suitable for recreational diving.
Which movement does it use?
Most versions use a Longines-branded automatic movement based on an ETA calibre, known for reliable everyday performance.
Does case size affect resale demand?
Mid-size cases around 41-43mm tend to see the strongest demand, though smaller sizes suit narrower wrists.
Explore more pre-owned