Longines L3.788.4.96.6
What Should You Pay?
Estimated fair market values. Actual prices vary by condition, completeness, and seller.
New / Like New / Full Kit
$1,900 – $2,370
low confidence
Excellent / Pre-Owned
$1,597 – $1,991
low confidence
Used / Watch Only
$1,293 – $1,613
low confidence
Fair Market Value
$1,794
Blended estimate for excellent condition
Recent Comparable Listings
Community Marketplace
| Date | Condition | Asking Price | Deal |
|---|---|---|---|
| May 26 | Like New | $1,900 | great |
The Longines HydroConquest L3.788.4.96.6 is a 42mm diver's watch featuring a blue lacquered dial and a unidirectional rotating bezel with a blue ceramic insert. It is powered by the Longines caliber L888, an automatic movement with a silicon balance spring and a 72-hour power reserve.
Specifications
Case Diameter 42 mm
Case Material stainless steel
Case Shape round
Case Back solid
Water Resistance 300m
Crystal sapphire
Bezel Type rotating_unidirectional
Bezel Material ceramic
Dial Color blue
Dial Indexes applied
Dial Hands stick
Bracelet/Strap stainless steel
Bracelet Material stainless steel
Clasp deployant
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