Longines HydroConquest HydroConquest 39 Automatic Stainless Steel / Blue / Bracelet
Reference L3.780.4.96.6
About this watch
The Longines HydroConquest 39 Automatic is a stunning dive watch that exudes elegance and sportiness. With its matte blue dial, mixed indexes, and proprietary hands, this timepiece is both visually striking and highly readable. Protected by a sapphire crystal and boasting an impressive water resistance of 300 meters, the HydroConquest is designed to withstand even the most demanding underwater adventures. At its heart lies the Longines caliber L888.5, a chronometer-certified self-winding movement that features a silicon balance spring for enhanced accuracy and durability. The watch's robust stainless steel case and comfortable ceramic bezel add to its durability and style, while the adjustable stainless steel bracelet ensures a secure fit on any wrist size. Whether you're diving into the ocean or heading to a dinner party, the Longines HydroConquest 39 Automatic is the perfect timepiece for those who appreciate quality, style, and performance.
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Key Features
- Stunning blue dial
- Chronometer-certified movement
- 300m water resistance
- Sapphire crystal protection
- Silicon balance spring
- Robust stainless steel case
- Adjustable stainless steel bracelet
Specifications
- Brand
- Longines
- Family
- HydroConquest
- Model
- HydroConquest 39 Automatic Stainless Steel / Blue / Bracelet
- Reference
- L3.780.4.96.6
- Movement
- l888-5
- Movement Features
-
- Hours, Minutes, Seconds
- Date
- Chronometer
- Case
- 39mm
- Dial Color
- Blue
- Crystal
- Sapphire
- Water Resistance
- 300
Current Listings

Pre-Owned Longines Hydroconquest GMT L3.890.4.56.6
Pre-owned Longines Hydroconquest GMT watch in 43mm stainless steel case with automatic movement, black dial, and 300m water resistance.
- Condition: 95% condition, faint marks on the sides and back of the case; 91% condition, slight marks on the links and clasp for the bracelet
- Case size: 43mm diameter
- Water resistance: 300m depth rating
- Material: Stainless Steel
![[WTS] Longines Hydroconquest L3.781.3.58.9, Rose Gold & Rubber Strap](https://external-preview.redd.it/sedHMjnUuvXnaLuh_m9cQhYhZl3crWETDnGNzUAc5Y8.jpeg?auto=webp&s=396c686013e60f636725d758dced3e56c6f019c5)
Longines Hydroconquest L3.781.3.58.9, Rose Gold & Rubber Strap
This Longines Hydroconquest features a silver-tone stainless steel case with a black rubber strap, uni-directional rotating black ceramic bezel, and a black dial with rose gold-tone hands and index hour markers.
- Condition: Gently used with minor wear and tear, polishable
- Case size: 43mm diameter
- Water resistance: 300m / 1000ft depth rating
- Movement: Longines Calibre L888 Automatic movement
![[WTS] Longines Hydroconquest GMT, Excellent Condition, Box and papers](https://external-preview.redd.it/Kzo8UWMgzALN780NYa3F84HmhbkBhgW-EWtPHE8JwFA.jpeg?auto=webp&s=cb3be154dd49e9ef824e140297a48ccd9f6855af)
Longines Hydroconquest GMT, Excellent Condition, Box and papers
This Longines Hydroconquest GMT features a stainless steel case with black dial and ceramic bezel, housed on a stainless-steel bracelet. It has a screw-down back and crown, with a unidirectional notched bezel in black ceramic.
- Condition: Excellent condition
- Case size: 41mm diameter
Longines Hydroconquest Automatic
The Longines Hydroconquest is a comfortable and reliable automatic watch. It features a 41mm case size with a blue aluminum bezel and dial.
- Condition: Pre-owned, has been worn
- Case Size: 41mm
- Bezel Fade: yes, but lines up properly
- Wrist Size Fit: 7 7/8 inch wrist

>>REDUCED<< LONGINES HYDROCONQUEST ALL CERAMIC L3.784.4
This Longines HydroConquest All Ceramic features a ceramic case and bezel, black ZrO2 dial, and is water resistant to 300m. The watch has a 43mm diameter and comes with a rubber strap and deployant clasp.
- Condition: MINT
- Case material: ceramic
- Diameter: 43mm
- Water resistance: 300m
![[WTS] Longines Hydroconquest GMT 41mm Sunray Blue](https://external-preview.redd.it/TPNrRrfWvZmcz1LNiN8Vo1Lq8TX9AfOzDkaAzN1Pz-4.jpeg?auto=webp&s=7e4349a56034aab4504d4c94697bb5133ec12d3a)
Longines Hydroconquest GMT 41mm Sunray Blue
A Longines Hydroconquest GMT with a Sunray blue dial and ceramic bezel in a beautiful pre-owned condition.
- Condition: Very nice pre-owned condition, some minor hairlines on the bracelet/clasp
- Diameter: 41mm
- Bezel material: ceramic
![[WTS] Longines HydroConquest 39mm Ceramic Bezel (Like New. 5 Years of Factory Warranty)](https://external-preview.redd.it/Vr3TfrMNEW8B7uxK10VFGEYEnKTjEtjt6nmOLfzYjVc.jpeg?auto=webp&s=0ffd9112e7fc08f9f32e9f58c60b849b32bafe98)
Longines HydroConquest 39mm Ceramic Bezel (Like New. 5 Years of Factory Warranty)
A Longines HydroConquest 39mm watch with a ceramic bezel, purchased from an authorized dealer in Florence, Italy and barely worn.
- Condition: Like new
- Warranty: 5 years remaining
- Case Size: 39mm
REDUCED Longines HydroConquest 41mm Blue
This Longines HydroConquest 41mm Blue is a men's watch that features the newest movement, keeping excellent time with a +1.3spd deviation.
- Condition: Nearly new condition
- Purchase Year: 2024
- Warranty Status: Full warranty
- Movement Accuracy: +1.3spd