Longines HydroConquest 39 vs Steinhart Ocean One 39

Side-by-side comparison of specifications and features

LonginesHydroConquest 39

L3.740.4.56.6

SteinhartOcean One 39

Ocean-39

Key Differences

Best Value

Steinhart Ocean One 39 (Ocean-39)

Starting from $635

Biggest Price Drop

Longines HydroConquest 39 (Ref. L3.740.4.56.6)

-38.7% in 30 days

Price Comparison

Longines HydroConquest 39

MSRP

$2,000

New

$1,094

Used

$1,052

Steinhart Ocean One 39

MSRP

$740

New

$955

Used

$524

MSRP New (Amazon) Used (eBay)

Comparison of Longines HydroConquest 39, Steinhart Ocean One 39
Specification	Longines HydroConquest 39	Steinhart Ocean One 39
Pricing
MSRP	$2,000	$740
New Price	$1,094	$955
Used Price (Low)	$1,052	$524
Used Price (High)	$1,562	$1,495
30-Day Trend	↓ -38.7%	↓ -2.3%
Used Price Range	$1,052 - $1,562	$524 - $1,495
Identity
Reference	L3.740.4.56.6	Ocean-39
Nickname	N/A	N/A
Style	Diver, Sports	Diver, Sports
Release Era	2020s	2020s
Dimensions
Diameter	39mm	39mm
Thickness	N/A	13mm
Lug Width	N/A	20mm
Lug to Lug	N/A	47mm
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)	300m (diving)
Bezel	Unidirectional rotating	Unidirectional rotating
Dial
Dial Color	Black	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 39 vs Steinhart Ocean One 39 comparison is less about a universal winner and more about wrist presence versus easier fit, entry price versus premium finishing or specs. They both touch the diver and sports use case, so smaller spec differences can matter more than brand preference.

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 39

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

Steinhart Ocean One 39

Steinhart Ocean One 39 is a better fit for mechanical-watch enthusiasts, diver styling.

Key Differences

Movement and upkeep

Longines HydroConquest 39: automatic movement

Steinhart Ocean One 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 HydroConquest 39: 39mm

Steinhart Ocean One 39: 39mm · L2L 47mm

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 39: 300m

Steinhart Ocean One 39: 300m

Water resistance is similar on paper, so focus on fit, features, and price instead.

Price and value

Longines HydroConquest 39: $1,094

Steinhart Ocean One 39: $635

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 39: diver

Steinhart Ocean One 39: diver

Both lean into a similar diver use case — the choice is more about fit, features, and price than category.

Crystal and materials

Longines HydroConquest 39: sapphire crystal · steel

Steinhart Ocean One 39: sapphire crystal · steel

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

Choose Longines HydroConquest 39 If...

You are comfortable paying more for a stronger feature set.

Choose Steinhart Ocean One 39 If...

You want the lower current entry price.

Price and Value Notes

Steinhart Ocean One 39 is often the value play at current pricing, while Longines HydroConquest 39 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 39

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $1104 · Live listings

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

Steinhart Ocean One 39

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $635 · 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?

Neither is clearly smaller: case width is 39mm vs 39mm. Pick on strap and looks instead — the size difference is not what will decide this for you.

Which is better for swimming or rough daily wear?

They are rated the same, so water resistance will not decide this. Choose on strap material and how much you mind scratching the case.

Is the more expensive one worth it?

Steinhart Ocean One 39 is the value pick at roughly $459 less. Pay more only if a specific difference above matters to you — otherwise the cheaper one is the smarter buy. Confirm live listings, since marketplace pricing moves.