Longines Conquest vs Longines HydroConquest 39

Side-by-side comparison of specifications and features

LonginesConquest

L3.830.4.92.6

LonginesHydroConquest 39

L3.740.4.56.6

Key Differences

Best Value

Longines HydroConquest 39 (Ref. L3.740.4.56.6)

Starting from $1,094

Best Water Resistance

Longines HydroConquest 39 (Ref. L3.740.4.56.6)

300m (3x more)

Biggest Price Drop

Longines HydroConquest 39 (Ref. L3.740.4.56.6)

-13.5% in 30 days

Price Comparison

Longines Conquest

MSRP

$2,000

New

$1,920

Used

$1,891

Longines HydroConquest 39

MSRP

$2,000

New

$1,094

Used

$1,145

MSRP New (Amazon) Used (eBay)

Comparison of Longines Conquest, Longines HydroConquest 39
Specification	Longines Conquest	Longines HydroConquest 39
Pricing
MSRP	$2,000	$2,000
New Price	$1,920	$1,094
Used Price (Low)	$1,891	$1,145
Used Price (High)	$2,497	$1,380
30-Day Trend	↑ +32.0%	↓ -13.5%
Used Price Range	$1,891 - $2,497	$1,145 - $1,380
Identity
Reference	L3.830.4.92.6	L3.740.4.56.6
Nickname	N/A	N/A
Style	Sports, Casual	Diver, Sports
Release Era	2020s	2020s
Dimensions
Diameter	41mm	39mm
Thickness	N/A	N/A
Lug Width	N/A	N/A
Lug to Lug	N/A	N/A
Movement
Movement	Automatic	Automatic
Power Reserve / Battery	N/A	N/A
Accuracy	N/A	N/A
Case
Case Material	Stainless Steel	Stainless Steel
Crystal	Sapphire Crystal	Sapphire Crystal
Water Resistance	100m (recreational diving)	300m (diving)
Bezel	Fixed	Unidirectional rotating
Dial
Dial Color	Black/Blue (varies)	Black
Luminous	Yes	Yes
Community
Review Rating	N/A	N/A
In Collections	N/A	N/A
On Wishlists	N/A	N/A
Forum Threads	N/A	N/A

Quick Summary

Longines Conquest and Longines HydroConquest 39 can look close on a spec sheet, yet the tradeoffs that matter most are usually wrist presence versus easier fit, water-ready utility versus dressier everyday wear, sports character versus diver versatility. Treat it as a value-versus-upgrade decision — confirm the extra spend solves a problem you will notice every week.

How to choose

The biggest practical difference is usually movement and upkeep. Start with wrist fit and movement preference, then use water resistance and price to break the tie.

Longines Conquest

Longines Conquest is a better fit for buyers who want more wrist presence, mechanical-watch enthusiasts, sports styling.

Longines HydroConquest 39

Longines HydroConquest 39 is a better fit for smaller wrists, mechanical-watch enthusiasts, diver styling.

Key Differences

Movement and upkeep

Longines Conquest: automatic movement

Longines HydroConquest 39: automatic movement

Both use the same movement type, so maintenance differences are limited and fit or feature details should decide the purchase.

Size and wearability

Longines Conquest: 41mm

Longines HydroConquest 39: 39mm

Fit is a real separator here — compare case width and lug-to-lug before deciding, especially if wrist comfort matters more than headline features.

Water resistance

Longines Conquest: 100m

Longines HydroConquest 39: 300m

Water resistance is a meaningful separator here — the higher-rated option gives more flexibility for swimming or rougher daily use.

Price and value

Longines Conquest: $2,000

Longines HydroConquest 39: $1,094

There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.

Style and use case

Longines Conquest: sports

Longines HydroConquest 39: diver

Longines Conquest leans more sports, while Longines HydroConquest 39 pulls toward diver use case — pick the one that matches how you will actually wear it.

Crystal and materials

Longines Conquest: sapphire crystal · steel

Longines HydroConquest 39: sapphire crystal · steel

Materials are broadly similar, so finish, fit, and price will matter more than the materials list alone.

Choose Longines Conquest If...

You prefer more dial presence and a larger case feel.
You are specifically shopping for a sports style watch.
You are comfortable paying more for a stronger feature set.

Choose Longines HydroConquest 39 If...

You want a smaller case footprint on the wrist.
Swimming, beach use, or tougher daily wear is part of the plan.
You are specifically shopping for a diver style watch.

Price and Value Notes

Longines HydroConquest 39 is often the value play at current pricing, while Longines Conquest makes more sense if you will use its extra features regularly.

There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.

Where to Check Deals

Check current deals on Amazon and eBay using the buttons below — listing prices, seller quality, and condition can change quickly.

Check current deals on Amazon and eBay

Prices change often, so compare the latest listings and condition options before you buy.

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Longines Conquest

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $2277 · Live listings

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Longines HydroConquest 39

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $1242 · Live listings

Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.

Comparison FAQ

Which one is better for smaller wrists?

Start with case width and lug-to-lug. The watch that looks smaller on paper is often the safer choice, but lug shape and thickness still affect how it wears.

Which is better for swimming or rough daily wear?

Use the water resistance row as the first filter. Higher ratings generally give more flexibility for swimming and water exposure, but strap choice and overall condition still matter.

Should I choose based on price alone?

Price matters, but the better buy is the watch that matches your fit, feature priorities, and use case. Check live listings first, then decide whether the price gap actually changes the ownership experience.