Longines HydroConquest vs Longines Spirit 37

Side-by-side comparison of specifications and features

LonginesHydroConquest

L3.781.4.96.6

LonginesSpirit 37

L3.410.4.63.6

Key Differences

Best Value

Longines HydroConquest (Ref. L3.781.4.96.6)

Starting from $1,417

Best Water Resistance

Longines HydroConquest (Ref. L3.781.4.96.6)

300m (3x more)

Biggest Price Drop

Longines Spirit 37 (Ref. L3.410.4.63.6)

-14.3% in 30 days

Price Comparison

Longines HydroConquest

MSRP

$1,600

Used

$1,315

Longines Spirit 37

MSRP

$2,850

New

$2,488

Used

$2,010

MSRP New (Amazon) Used (eBay)

Comparison of Longines HydroConquest, Longines Spirit 37
Specification	Longines HydroConquest	Longines Spirit 37
Pricing
MSRP	$1,600	$2,850
New Price	N/A	$2,488
Used Price (Low)	$1,315	$2,010
Used Price (High)	$1,562	$2,938
30-Day Trend	↑ +18.5%	↓ -14.3%
Used Price Range	$1,315 - $1,562	$2,010 - $2,938
Identity
Reference	L3.781.4.96.6	L3.410.4.63.6
Nickname	N/A	N/A
Style	Diver, Sports	Pilot, Sports
Release Era	2010s	2020s
Dimensions
Diameter	41mm	37mm
Thickness	12.2mm	N/A
Lug Width	21mm	N/A
Lug to Lug	47.5mm	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	300m (diving)	100m (recreational diving)
Bezel	Unidirectional rotating	Fixed
Dial
Dial Color	Blue	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

This Longines HydroConquest vs Longines Spirit 37 comparison is less about a universal winner and more about wrist presence versus easier fit, water-ready utility versus dressier everyday wear, diver character versus pilot versatility. Start with fit first — case width and lug-to-lug usually matter more than secondary features if wrist comfort is a concern.

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 HydroConquest

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

Longines Spirit 37

Longines Spirit 37 is a better fit for smaller wrists, mechanical-watch enthusiasts, pilot styling.

Key Differences

Movement and upkeep

Longines HydroConquest: automatic movement

Longines Spirit 37: 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 HydroConquest: 41mm · L2L 47.5mm

Longines Spirit 37: 37mm

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 HydroConquest: 300m

Longines Spirit 37: 100m

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

Price and value

Longines HydroConquest: $1,417

Longines Spirit 37: $2,488

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 HydroConquest: diver

Longines Spirit 37: pilot

Longines HydroConquest leans more diver, while Longines Spirit 37 pulls toward pilot use case — pick the one that matches how you will actually wear it.

Crystal and materials

Longines HydroConquest: sapphire crystal · steel

Longines Spirit 37: sapphire crystal · steel

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

Choose Longines HydroConquest If...

You prefer more dial presence and a larger case feel.
Swimming, beach use, or tougher daily wear is part of the plan.
You are specifically shopping for a diver style watch.

Choose Longines Spirit 37 If...

You want a smaller case footprint on the wrist.
You are specifically shopping for a pilot style watch.
You are comfortable paying more for a stronger feature set.

Price and Value Notes

Longines HydroConquest is often the value play at current pricing, while Longines Spirit 37 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.

WatchCompared may earn a commission from qualifying purchases through affiliate links. This does not change your price.

Longines HydroConquest

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $1417 · Live listings

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

Longines Spirit 37

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $2270 · 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.