Longines HydroConquest Hydroconquest Chronograph L688
Reference L3.696.4.13.6
About this watch
The Longines Hydroconquest Chronograph L688 is a masterpiece of luxury watchmaking that seamlessly blends functionality, style, and heritage. This Swiss-made timepiece boasts an impressive array of features, including a robust stainless steel case with a silver dial, Arabic numerals, and proprietary hands designed for maximum readability. The rotating bezel, with its 0-60 scale, is a functional piece of art that's perfect for measuring elapsed time while diving or engaging in other time-critical activities. At the heart of this watch lies the Longines caliber L688.2, an automatic movement that offers precision and reliability, with a frequency of 28,800 vibrations per hour and a power reserve of 54 hours. With its impressive water resistance of up to 300 meters, this watch is built to withstand the elements, making it perfect for both land-lovers and divers alike. Its sleek aesthetics and refined elegance make it suitable for any occasion, from casual to formal settings.
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Key Features
- Longines caliber L688.2 automatic movement
- Rotating bezel with 0-60 scale
- Stainless steel case with silver dial
- Arabic numerals and proprietary hands
- Water resistance up to 300 meters
- Sapphire crystal glass
- 41.00 mm diameter
Specifications
- Brand
- Longines
- Family
- HydroConquest
- Model
- Hydroconquest Chronograph L688
- Reference
- L3.696.4.13.6
- Movement
- l688-2
- Movement Features
-
- Hours, Minutes, Small Seconds
- Date
- Chronograph, Column wheel
- Case
- Stainless Steel 41mm
- Dial Color
- Silver
- Crystal
- Sapphire
- Water Resistance
- 300
Current Listings
![[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
![[WTS] Longines Hydroconquest 39mm](https://preview.redd.it/j0qiwnh0r71h1.jpeg?auto=webp&s=149e7e806f9c75a04bd76edd823cd16d02223f52)
Longines Hydroconquest 39mm
A Longines Hydroconquest diver's watch in excellent condition, featuring a 2026 movement and virtually no signs of wear.
- Condition: 9.6/10 - extremely clean example
- Movement: 2026
- Case condition: virtually no signs of wear
- Box included: true
![[WTS] Longines Hydroconquest 39mm Limited Edition Commonwealth Games Mint](https://preview.redd.it/nl26c159pr0h1.jpg?width=640&crop=smart&auto=webp&s=39aff2e3e4e52101bb87e437d2067e0379d65704)
Longines Hydroconquest 39mm Limited Edition Commonwealth Games Mint
A limited edition Longines Hydroconquest, purchased just a week ago and still under warranty.
- Condition: Mint
- Case Size: 39mm
- Limited Edition Quantity: 2026 pieces
- Warranty Length: five years