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
125 pieces
Sourcing
Authenticity-guaranteed resale · UK
The edit — 125 pieces
96 of 125 shown
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 39mm L3.779.4.90.6
£1,848.59
From United States · Ships to UK
Longines
Longines Hydroconquest GMT 41mm Black Dial on Bracelet 2024
£1,842.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest 41mm Auto Chronograph Date Blue Dial L3.834.4.96.6
£1,791.70
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest 39mm Green Automatic L37794066 Full Set Excellent
£1,650.00
From United Kingdom · Ships to UK
Longines
LONGINES Hydroconquest 42mm Automatic Blue Dial - 2026
£1,600.00
From United Kingdom · Ships to UK
Longines
LONGINES HydroConquest L3.788.4.56.6 Automatic Mens Watch Excellent++ A7158
£1,563.30
From Japan · Ships to UK
Longines
Longines Hydroconquest Green Dial , Green Bezel 39mm Automatic
£1,539.99
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest Mens Watch 2025 Grey Gold Automatic Mans Wristwatches VGC
£1,536.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Automatic 41mm Black Dial Rubber Strap 300m Box Papers
£1,536.70
From United Kingdom · Ships to UK
Longines
Longines Men's Hydroconquest 42mm Automatic Green Dial Watch L3.788.4.06.6
£1,440.00
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest Date L3.780.3 Automatic Sunray Grey Dial 39mm RRP £1900
£1,332.69
From United Kingdom · Ships to UK
Longines
Longines HYDROCONQUEST 41mm Automatic Watch L37814566
£1,256.20
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Men's Automatic 41mm Blue Dial Date Rubber Strap Box
£1,188.38
From United States · Ships to UK
Longines
Longines HydroConquest 2026 42mm Blue Dial Mesh Bracelet Box Papers Full Set
£1,179.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest 2026 42mm Blue Dial Mesh Bracelet Box Papers Full Set
£1,179.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Black Men's Watch - L3.781.4.56.6. - Mint condition.
£1,154.20
From United Kingdom · Ships to UK
Longines
Longines HydroConquest L3.781.3
£1,128.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Blue L3.841.4 - Automatic - 44mm (2021) Full Set
£1,100.00
From United Kingdom · 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 39mm L3.781.3.58.9
£1,026.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest 43mm Automatic Black Dial Two-Tone Gold Steel Full Set
£1,000.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Men's Black Watch - L3.781.4.56.6
£991.00
From United Kingdom · 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
Second Hand Longines Hydro Conquest Watch L3.784.4
£3,368.75
From United Kingdom · Ships to UK
Longines
Longines HydroConquest 41mm Quartz Blue Dial 300m Date Black Rubber
£1,597.90
From United Kingdom · Ships to UK
Longines
Longines HydroConquest L3.781.4.06.9 Auto Green Ceramic MINT Box Papers 41mm
£960.25
From Japan · Ships to UK
Longines
LONGINES HydroConquest L3.740.4.56.6 Quartz Men's Watch Black Dial Box
£935.31
From Japan · Ships to UK
Longines
Longines HydroConquest L37424967 41mm Blue Dial Automatic Two-Tone
£924.70
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest 41mm Automatic Watch L3.781.4.56.9 Immaculate Condition!
£924.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Blue Men's Watch - L3.781.4.96.6
£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 L3.742.3 Bi‑Colour 41mm Auto Blue Dial 300m Full Set 2021
£889.99
From United Kingdom · Ships to UK
Longines
LONGINES HydroConquest Blackout Automatic 41mm - Limited Edition of 500 in J...
£886.26
From Japan · Ships to UK
Longines
Longines HydroConquest 41mm QTZ SS BLK Dial Mens Watch L3.740.3.56.7
£879.51
From United States · 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 Quartz Diver Black Dial Stainless Steel 300m Box & Papers
£849.99
From United Kingdom · Ships to UK
Longines
LONGINES HydroConquest L3.841.4 Automatic Mens Watch Excellent A7201
£826.02
From Japan · Ships to UK
Longines
Longines Hydro Conquest L3.779.4.99.6 CE×SS SS AT blue dial
£1,675.10
From Japan · Ships to UK
Longines
Longines HydroConquest Automatic 41mm Two Tone Gold Black Dial Watch L3.742.3
£800.00
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 WATCH HYDROCONQUEST COMMONWEALTH GAMES BIRMINGHAM LIMITED L37814596 F/S
£1,556.23
From Japan · Ships to UK
Longines
Longines HydroConquest L3 782 4 06 9 Automatic Mens Watch Green Rubber
£1,553.06
From Japan · Ships to UK
Longines
Longines HydroConquest L3.642.4 Automatic Men’s Wrist Watch Used Working
£718.72
From Italy · Ships to UK
Longines
Longines HydroConquest GMT L3.790.4 41mm Black Dial Box Papers 2025
£1,440.39
From Canada · Ships to UK
Longines
Longines HydroConquest Blue Men's Watch - L3.741.4.96.6
£706.25
From United States · Ships to UK
Longines
A Longines HydroConquest 41mm Blue Dial Gold and Bi Metal Stainless Steel Watch
£699.54
From United Kingdom · Ships to UK
Longines
Longines HydroConquest 41mm Automatic Watch L3.740.3 Steel&Gold
£695.20
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest 41mm blue and gold two tone divers watch
£695.20
From United Kingdom · 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
£649.99
From United Kingdom · Ships to UK
![[N MINT] Longines Hydro Conquest L3.648.4 Automatic Date 41mm 25J Men's Watch](https://i.ebayimg.com/images/g/3YoAAeSw0FZqiReu/s-l1600.jpg)
Longines
[N MINT] Longines Hydro Conquest L3.648.4 Automatic Date 41mm 25J Men's Watch
£651.59
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 Ceramic Chronograph 43mm Black Dial/Strap 300m L38834569
£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
![[Excellent] Longines Hydro Conquest Automatic L3.742.4 41mm Black Dial Watch](https://i.ebayimg.com/images/g/-R8AAeSwvDhqiBs7/s-l1600.jpg)
Longines
[Excellent] Longines Hydro Conquest Automatic L3.742.4 41mm Black Dial Watch
£588.53
From Japan · Ships to UK
Longines
Genuine Longines Hydroconquest Black 41mm Automatic Watch
£567.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Green Men's Watch - L3.782.4.06.6
£1,077.70
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 L3.782.4.06.9 Green Automatic Men's Watch 43mm #M-7179
£1,057.85
From Japan · Ships to UK
Longines
LONGINES Hydro Conquest L3.781.4 Date black Dial Automatic Men's Watch_962496
£1,007.92
From Japan · Ships to UK
Longines
Longines HydroConquest 41mm Grey Ceramic Automatic L3.781.4 Full Set Box Papers
£999.99
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 Automatic Green 41mm | Full Set | Box & Papers
£983.86
From United Kingdom · Ships to UK
Longines
Longines HydroConquest L3.740.3.58.7 w049000177640 *
£950.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Blue Dial Quartz 44mm Gents Watch L3.840.4 2023 Full Set
£945.00
From United Kingdom · Ships to UK
Longines
LONGINES Hydro Conquest L3.781.3 Date blue Dial Automatic Men's Watch_970485
£889.30
From Japan · Ships to UK
Longines
Longines Hydroconquest Black Divers Watch - RRP £1700
£873.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest XXII Commonwealth Games Limited Edition Watch
£849.00
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Men's Watch 39mm Bracelet And Black Rubber Strap,Full Set
£822.70
From United Kingdom · Ships to UK
Longines
Longines HydroConquest 41mm Blue Dial Automatic Men's 300m Divers Watch L3.742.4
£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 41mm Sunray Blue Automatic Diver Watch L3.781.4
£772.07
From Australia · 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 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 Men's Diver's Watch Blue Dial, 300m, 2020, Box, L38404
£761.50
From United Kingdom · Ships to UK
Longines
Longines HydroConquest L3.640.3 Swiss Rotating Bezel Blue Watch 'Box and Paper'
£741.00
From Italy · Ships to UK
Longines
Longines HydroConquest L3.640.3 Swiss Rotating Bezel Black Watch 'Box and Paper'
£741.00
From Italy · Ships to UK
Longines
Longines HydroConquest L3.640.4 Swiss Rotating Bezel Blue Watch 'Box and Paper'
£740.00
From Italy · Ships to UK
Longines
Longines HydroConquest L3.640.4 Swiss Rotating Bezel Black Watch 'Box and Paper'
£740.00
From Italy · Ships to UK
Longines
Longines HydroConquest 41mm Green Automatic Men's Watch - L37814069
£734.72
From Australia · Ships to UK
Longines
Longines HydroConquest L3.780.4 #121
£735.26
From Japan · Ships to UK
Longines
Longines HydroConquest Chronograph L3.690.4.53.6 (W0127)
£735.67
From Germany · Ships to UK
![[N MINT w/BOX] LONGINES L3.782.4 Hydro Conquest Automatic Men's Watch from Japan](https://i.ebayimg.com/images/g/ds0AAeSwvdFprODD/s-l1600.jpg)
Longines
[N MINT w/BOX] LONGINES L3.782.4 Hydro Conquest Automatic Men's Watch from Japan
£733.56
From Japan · Ships to UK
Longines
LONGINES Hydro Conquest L3.651.4 Chronograph Automatic Men's Watch #1409B
£729.20
From Japan · 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 HydroConquest Automatic 41mm Black Dial L3.642.4 Full Box & Papers 2013
£719.68
From United Kingdom · Ships to UK
Longines
Longines HydroConquest Black L3.741.4.56.6 Automatic Men's Watch 39mm
£715.60
From United Kingdom · Ships to UK
Longines
Longines Hydroconquest Ref.L3.6403 Rotating Bezel BlackDial Swiss Watch-Box&Papr
£716.50
From Poland · Ships to UK
Longines
Longines Hydroconquest Ref.L3.6404 Rotating Bezel BlackDial Swiss Watch-Box&Papr
£716.50
From Poland · Ships to UK
Longines
Longines Hydroconquest Ref. L3.6404 ,300m Rotating Bezel Silver Dial Swiss Watch
£716.50
From Poland · Ships to UK
Longines
Longines Hydroconquest Ref.L3.6404 Rotating Bezel Blue Dial Swiss Watch-Box&Papr
£716.50
From Poland · 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