Doxa SUB 300 Sharkhunter vs Longines HydroConquest 39

Side-by-side comparison of specifications and features

DoxaSUB 300 Sharkhunter

SUB300-SH

LonginesHydroConquest 39

L3.740.4.56.6

Key Differences

Best Value

Longines HydroConquest 39 (Ref. L3.740.4.56.6)

Starting from $1,094

Biggest Price Drop

Longines HydroConquest 39 (Ref. L3.740.4.56.6)

-38.7% in 30 days

Price Comparison

Doxa SUB 300 Sharkhunter

MSRP

$2,890

Used

$1,833

Longines HydroConquest 39

MSRP

$2,000

New

$1,094

Used

$1,052

MSRP New (Amazon) Used (eBay)

Comparison of Doxa SUB 300 Sharkhunter, Longines HydroConquest 39
Specification	Doxa SUB 300 Sharkhunter	Longines HydroConquest 39
Pricing
MSRP	$2,890	$2,000
New Price	N/A	$1,094
Used Price (Low)	$1,833	$1,052
Used Price (High)	$1,833	$1,562
30-Day Trend	↓ -6.0%	↓ -38.7%
Used Price Range	$1,833 - $1,833	$1,052 - $1,562
Identity
Reference	SUB300-SH	L3.740.4.56.6
Nickname	N/A	N/A
Style	Diver, Luxury	Diver, Sports
Release Era	2020s	2020s
Dimensions
Diameter	42.5mm	39mm
Thickness	13.4mm	N/A
Lug Width	20mm	N/A
Lug to Lug	45mm	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)	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

If you are deciding between Doxa SUB 300 Sharkhunter and Longines HydroConquest 39, the real decision is usually about wrist presence versus easier fit, entry price versus premium finishing or specs. 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.

Doxa SUB 300 Sharkhunter

Doxa SUB 300 Sharkhunter is a better fit for buyers who want more wrist presence, mechanical-watch enthusiasts, diver styling.

Longines HydroConquest 39

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

Key Differences

Movement and upkeep

Doxa SUB 300 Sharkhunter: 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

Doxa SUB 300 Sharkhunter: 42.5mm · L2L 45mm

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

Doxa SUB 300 Sharkhunter: 300m

Longines HydroConquest 39: 300m

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

Price and value

Doxa SUB 300 Sharkhunter: $1,833

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

Doxa SUB 300 Sharkhunter: diver

Longines HydroConquest 39: diver

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

Crystal and materials

Doxa SUB 300 Sharkhunter: 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 Doxa SUB 300 Sharkhunter If...

You prefer more dial presence and a larger case feel.
You are comfortable paying more for a stronger feature set.

Choose Longines HydroConquest 39 If...

You want a smaller case footprint on the wrist.
You want the lower current entry price.

Price and Value Notes

Longines HydroConquest 39 is often the value play at current pricing, while Doxa SUB 300 Sharkhunter 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.

Doxa SUB 300 Sharkhunter

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $1833 · Live listings

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

Comparison FAQ

Which one is better for smaller wrists?

Longines HydroConquest 39 — it is 39mm wide versus 42.5mm.

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?

Longines HydroConquest 39 is the value pick at roughly $739 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.