Longines L37804566
HydroConquest 39mm Automatic
Retail $1,850
What Should You Pay?
Estimated fair market values. Actual prices vary by condition, completeness, and seller.
New / Like New / Full Kit
$1,527 – $1,905
medium confidence
Excellent / Pre-Owned
$1,283 – $1,601
medium confidence
Used / Watch Only
$1,039 – $1,296
medium confidence
Fair Market Value
$1,442
Blended estimate for excellent condition
A modern diving watch from Longines' HydroConquest collection featuring a versatile 39mm case size. This reference combines professional diving capabilities with refined aesthetics, featuring a black ceramic bezel, black dial, and stainless steel construction throughout.
Specifications
Case Diameter 39 mm
Case Height 12 mm
Case Material stainless steel
Case Shape round
Case Back screw_down
Lug Width 19 mm
Water Resistance 300m
Crystal sapphire
Bezel Type rotating_unidirectional
Bezel Material ceramic
Dial Color black
Dial Indexes mixed
Dial Hands sword
Bracelet/Strap metal
Bracelet Material stainless steel
Clasp fold_over
Complications date
Movement
Movement Calibre L888
Type automatic
Power Reserve 72 hours
Frequency 25,200 vph
Jewels 21
Functions hours, minutes, seconds, date
More from HydroConquest
View all HydroConquest references →Related Guides & Articles
Market Research
Best Secondhand Watch Deals Right Now
The best deals on pre-owned watches this month — undervalued models from Rolex, Omega, Tudor, Seiko, and more, with current market prices and why they're worth buying.
Mar 7, 2026
Buyer's GuidePre-Owned Longines: Buying Guide & Prices
How to buy a secondhand Longines — from the Spirit to the HydroConquest, with pre-owned prices and the best value picks in the collection.
Mar 4, 2026