Longines HydroConquest HydroConquest 39 Automatic Stainless Steel - Pink Gold / Grey / Bracelet
Reference L3.780.3.78.6
About this watch
The Longines HydroConquest L3.780.3.78.6 is a stunning luxury watch that combines elegance with functionality. This automatic stainless steel model features a 39mm diameter, 12.20mm height, and ceramic, stainless steel materials for durability. With a water resistance rating of 300 meters, it's perfect for diving enthusiasts or casual wearers who appreciate a robust yet stylish watch. The sleek design boasts pink gold accents, a grey matte finish, and mixed indexes that provide unique visual appeal. The proprietary hands ensure optimal legibility, making it easy to tell the time in any environment. Additional features include a date function, rotating bezel with 0-60 scale, and adjustable clasp for customizable comfort.
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Key Features
- Longines caliber L888.5 automatic movement
- 300m water resistance rating
- 39mm diameter stainless steel case
- Ceramic and PVD gold coating for durability
- Silicon balance spring for enhanced accuracy
- 64-hour power reserve
- Date function and rotating bezel with 0-60 scale
Specifications
- Brand
- Longines
- Family
- HydroConquest
- Model
- HydroConquest 39 Automatic Stainless Steel - Pink Gold / Grey / Bracelet
- Reference
- L3.780.3.78.6
- Movement
- l888-5
- Movement Features
-
- Hours, Minutes, Seconds
- Date
- Chronometer
- Case
- 39mm
- Dial Color
- Grey
- Crystal
- Sapphire
- Water Resistance
- 300
Current Listings
![[WTS] Longines Hydroconquest with Box+Papers](https://preview.redd.it/ufs3q92kwnqg1.jpg?width=640&crop=smart&auto=webp&s=2f5fe082ba368fba8b3e4d15ad1881f32276f91e)
Longines Hydroconquest with Box+Papers
A gently used Longines Hydroconquest in excellent condition, complete with box, papers, and original accessories.
- Condition: Near perfect with minor scratches on the back of the lugs
- Box And Papers: Included
- Bracelet Links: Extra links after sizing
- Warranty Card: Included
![[WTS] OEM Longines HydroConquest GMT 41mm Black Rubber Strap (21mm) w/ OEM Deployant Clasp – Excellent](https://preview.redd.it/mv87c1g0enqg1.jpg?width=640&crop=smart&auto=webp&s=2a32fe1a3788a77d32cc61bc45ef2cfbc01abbc4)
OEM Longines HydroConquest GMT 41mm Black Rubber Strap (21mm) w/ OEM Deployant Clasp – Excellent
A Longines HydroConquest GMT watch with a 41mm black rubber strap and deployant clasp, featuring a comfortable on-the-fly micro-adjust mechanism. The watch has been worn sparingly and shows minimal signs of wear.
- Condition: Lightly used
- Lug width: 21mm
- Clasp type: deployant
![[WTS] Longines Hydroconquest GMT - Sunray Brown - 41mm- Full Kit - Excellent Condition](https://preview.redd.it/74ipd0kadfqg1.jpg?width=640&crop=smart&auto=webp&s=11277a9581488bfda627dff42f1cb6f73f7fe61a)
Longines Hydroconquest GMT - Sunray Brown - 41mm- Full Kit - Excellent Condition
A Longines Hydroconquest GMT 41mm with a sunray brown dial and ceramic bezel insert, featuring an updated bezel and quick-adjust bracelet. It has a true GMT movement that keeps excellent time.
- Condition: Excellent
- Case size: 41mm
- Lug-to-lug: 49.2mm
- Thickness: 12.8mm
![[WTS] Longines HydroConquest 41mm Two Tone $1750](https://preview.redd.it/u7fkctlv2upg1.jpg?width=640&crop=smart&auto=webp&s=ba25fdac5147f1eb509169328273088acc6931ce)
Longines HydroConquest 41mm Two Tone $1750
Longines HydroConquest in a two-tone version, sold as-is.
- 41mm diameter: case size
![[WTS] Longines Hydroconquest Two-tone 41mm](https://preview.redd.it/puekxcrr4gpg1.jpg?width=640&crop=smart&auto=webp&s=e294ab3b5bb1c4ea1692a976f6def1f8e334c8ca)
Longines Hydroconquest Two-tone 41mm
This Longines Hydroconquest Two-Tone is a 41mm watch that comes with all its original components, including a blank card.
- Condition: Absolutely beautiful condition!
- Case size: 41mm
![[WTS] Longines Hydroconquest GMT 41mm](https://preview.redd.it/2cfcxnaix9pg1.jpg?width=640&crop=smart&auto=webp&s=f4e810aeaaa75abf3d85c8d4aa4d54b8f9fa4b07)
Longines Hydroconquest GMT 41mm
The Longines Hydroconquest GMT is a blue-dialed watch featuring a GMT complication, housed in a 41mm case. It comes with a complete full set and eBay verification.
- Condition: Pre-owned with minor wear
- Case size: 41mm
- Bracelet condition: Minor wear
![[WTS] Longines HydroConquest Automatic watch, 41.00 mm, stainless steel and ceramic bezel, L3.781.3.96.7– Ref L3.781.3.96.7 – Full Set – Feb 2026](https://preview.redd.it/7p381814g3pg1.jpg?width=640&crop=smart&auto=webp&s=875fd76e05b1011b6bde95b1b6bc62c97d445914)
Longines HydroConquest Automatic watch, 41.00 mm, stainless steel and ceramic bezel, L3.781.3.96.7– Ref L3.781.3.96.7 – Full Set – Feb 2026
- Bezel material: stainless steel and ceramic
- Case size: 41.00 mm
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