Longines HydroConquest Hydroconquest Automatic 39
Reference L3.648.4.56.6
About this watch
The Longines Hydroconquest Automatic 39 is a luxury dive watch that exudes elegance and sophistication. Its sleek design, robust build, and black dial make it a statement piece on the wrist. The watch's rotating bezel, marked from 0 to 60, is ideal for timing dives or other activities, while its sapphire glass ensures scratch-resistance and durability. Powered by the Longines caliber L633.5 automatic movement, this watch boasts a frequency of 28,800 beats per hour and a power reserve of 38 hours. With water resistance up to 300 meters, it's built for serious use, whether diving into the ocean or splashing around in the pool. The stainless steel bracelet feels sturdy yet comfortable on the wrist, making it perfect for all-day wear. This watch is not just a timekeeper, but an investment in style, functionality, and durability.
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Key Features
- Automatic Movement
- Water Resistance up to 300m
- Sapphire Glass
- Stainless Steel Case and Bracelet
- Rotating Bezel with 0-60 Markings
Specifications
- Brand
- Longines
- Family
- HydroConquest
- Model
- Hydroconquest Automatic 39
- Reference
- L3.648.4.56.6
- Movement
- l633-5
- Movement Features
-
- Hours, Minutes, Seconds
- Date
- Case
- Stainless Steel 39mm
- Dial Color
- Black
- Crystal
- Sapphire
- Water Resistance
- 300
Current Listings
![[WTS] Longines Hydroconquest 39mm black bezel - 2026 release](https://preview.redd.it/dzaj40g6hy1h1.jpg?width=640&crop=smart&auto=webp&s=e0c4109dad4c105e423f52606ae0c699f43b8b83)
Longines Hydroconquest 39mm black bezel - 2026 release
A 39mm black bezel Longines Hydroconquest with a black dial, sold in full kit and unregistered for warranty purposes.
- Condition: Like-new
- Case diameter: 39mm
- Condition notes: No scratches anywhere on the case, crystal or bracelet
![[WTS] Longines HydroConquest GMT 41mm – $1800](https://preview.redd.it/yyk27c11dw1h1.jpg?width=640&crop=smart&auto=webp&s=4573c305514b6d6f5b16e88d62128df5d517e2e9)
Longines HydroConquest GMT 41mm – $1800
This Longines HydroConquest GMT features a 41mm case and is in great condition, despite some minor imperfections on the bezel and bracelet.
- Condition: Pre-owned with minor wear
- Case Size: 41mm
- Bezel Condition: Clean
![[WTS] Longines Hydroconquest Quartz Two Tone L3.740.3.56.7 - $550](https://preview.redd.it/q20m9xof6p1h1.jpg?width=640&crop=smart&auto=webp&s=64fde65853d57c300e741bf001e1d758a57af2f2)
Longines Hydroconquest Quartz Two Tone L3.740.3.56.7 - $550
A Longines Hydroconquest quartz two-tone diver watch, featuring a black dial and 41mm case size.
- Condition: Pre-owned with light scratches
- Case size: 41mm
- Material: two tone
![[WTS] Longines Hydroconquest Quartz Two Tone L3.740.3.56.7 - $550](https://preview.redd.it/xctcalo9zk1h1.jpg?width=640&crop=smart&auto=webp&s=650ef270e5e02acf60bc86c32f9eda97d9f00f45)
Longines Hydroconquest Quartz Two Tone L3.740.3.56.7 - $550
This Longines Hydroconquest is a fun and capable diver that comes in the 41mm version, featuring a black dial and quartz movement.
- Condition: pre-owned with light scratches
- Case Size: 41mm
- Movement Type: quartz
![[WTS] Longines Hydroconquest 39mm black bezel/dial](https://preview.redd.it/hcrkd9h0gk1h1.jpg?width=640&crop=smart&auto=webp&s=222db94fb2131661aa9dba6f84c909ccca5404c9)
Longines Hydroconquest 39mm black bezel/dial
This Longines Hydroconquest 39mm features a black bezel and dial, is in excellent condition, and comes with its full kit including boxes, hangtags, warranty card, and owner's manual.
- Condition: Like-new
- Case size: 39mm diameter
- Box status: full-kit
- Warranty remaining: five years
![[WTS] Longines HydroConquest Two Tone Green Dial $1499](https://preview.redd.it/hphc8owmqi1h1.jpg?width=640&crop=smart&auto=webp&s=270753abc4debb68258ba2ec87a877355f71de20)
Longines HydroConquest Two Tone Green Dial $1499
Longines HydroConquest Two Tone Green Dial for sale
![[WTS] Longines HydroConquest 42mm | 2026 Gen | Green Ceramic | Green Lacquered Dial | Ref. L3.788.4.06.6 | Never Sized, Never Worn | Full Kit | Warranty Card 5/8/26](https://preview.redd.it/vtb6vc2eki1h1.jpg?width=640&crop=smart&auto=webp&s=ecf33b0d47c8fa5982fd26fddc1205cdc129cf67)
Longines HydroConquest 42mm | 2026 Gen | Green Ceramic | Green Lacquered Dial | Ref. L3.788.4.06.6 | Never Sized, Never Worn | Full Kit | Warranty Card 5/8/26
This is the first real redesign the HydroConquest has seen in nearly a decade with thinner case and upgraded ceramic bezel with audible click.
- Condition: Never sized, never worn
- Movement: Calibre L888.5, automatic, silicon balance spring, 72hr power reserve
- Water resistance: 300m / 30 bar
- Box papers: Full double-box set with instruction manual and tags present
![[WTS] Longines Hydroconquest 41mm Black dial](https://preview.redd.it/r9zms2m3dc1h1.jpg?width=640&crop=smart&auto=webp&s=fb0ee84491b408eecf29c00533dbf94361e7658e)
Longines Hydroconquest 41mm Black dial
A Longines Hydroconquest 41mm with a black dial is being sold. The watch features an original box and bracelet, as well as two additional straps.
- Condition: Very good condition, a few scuffs on the sapphire but no scratches
- Case size: 41mm
- Bracelets: 2
- Straps: 2
![[WTS] Longines Hydroconquest 39mm L3.779.4.96.6](https://preview.redd.it/zub5je7bs71h1.jpg?width=640&crop=smart&auto=webp&s=c13e2690b5c678b496a1014ea9a0e708206ff81c)
Longines Hydroconquest 39mm L3.779.4.96.6
A Longines Hydroconquest 39mm with a frosted blue dial, this watch features a unique and stylish design.
- Condition: Like new
- Size: 39mm diameter