Is the Longines HydroConquest worth $3,350?

At $3,350 it is priced at the top of its recent range, and only one store lists it new. It is a fair price for a ceramic-bezel Swiss automatic diver, but there is little room to shop around right now.

How does it compare with the previous HydroConquest?

This generation moved to a ceramic bezel and the L888.5 movement with about 72 hours of reserve, up from the older aluminum bezel and shorter reserve. The case is also slimmer than earlier 41 mm models.

Is 42 mm too big for a small wrist?

At 42 mm wide and 11.7 mm thick, it suits wrists around 6.75 inches and up. Under that, the lugs may overhang, and the 180 g weight is noticeable.

Can I swim and dive with it?

Yes. It is rated to 300 m with a screw-down crown, so swimming, snorkeling and recreational diving are fine. Rinse it with fresh water after salt water use.

The watch on its steel bracelet, a Longines box and warranty card. The international warranty covers the movement for five years.

When is the best time to buy it?

With one new listing at $3,350, there is no discount to wait for. Watch for holiday sales or gray-market listings, and check the warranty source before buying.

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This hour's deals

Longines HydroConquest Ref. L3.788.4.06.6

−45%

Jewelry · WatchMaxx.com

Longines HydroConquest Ref. L3.788.4.06.6

Name: Longines HydroConquest Ref. L3.788.4.06.6
Brand: Longines
Rating: 4.9 (35 reviews)

Deal score 8.0 · Steal

$1,290.00$2,350.00 WatchMaxx.com's regular price

You save $1,060.00 at WatchMaxx.com

Deal.ai's agents found this deal on November 6. The store may have changed its price since.

Why it's a great deal

Elsewhere right now: Jomashop.com $1,712.50, Walmart $1,850.00 (typical $1,781.25 across 2 stores)
WatchMaxx.com lists its regular price at $2,350.00: 45% off by its own figures
Rated 4.9 out of 5 by 35 buyers

Visit WatchMaxx.com

Every store we checked

WatchWarehouse.comNew
In stock
$1,248.00Observed at 10:27 AM
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WatchMaxx.comNew
In stock
$1,290.00Observed at 10:27 AM
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PrestigeTime.comNew
In stock
$1,830.00Observed at 10:27 AM
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WalmartNew
In stockSold by WatchMaxx
$1,850.00Observed at 10:27 AM
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Price history and every store's price →

Reading WatchMaxx.com’s product page for the details…

Specs

Case diameter: 42 mmSource
Case thickness: 11.70 mmSource
Case material: SteelSource
Bezel material: CeramicSource
Crystal: SapphireSource
Water resistance: 300 MetresSource
Movement: AutomaticSource
Caliber: L888.5Source
Power reserve: 72 Hours ApproxSource
Dial color: GreenSource

About the Longines HydroConquest Ref. L3.788.4.06.6

The Longines HydroConquest Ref. L3.788.4.06.6 is a 42 mm steel dive watch with a green dial, a ceramic bezel and 300 m water resistance. It runs on the automatic L888.5 movement with about 72 hours of power reserve and a sapphire crystal. At $3,350 at Amazon as of November 4, 2026, it sits at the top of its recent range, with only one store listing it new.

Best forDive watch fans who want Swiss automatic at under $4,000Buyers who prefer a green dial over the usual black or blueWearers who want one watch for office and waterPeople who value a long 72-hour power reserve

Pros

Ceramic bezel resists fading and scratches
300 m water resistance with a screw-down crown
L888.5 movement with about 72 hours of reserve
Sapphire crystal and solid steel bracelet
Slim 11.7 mm case for a 300 m diver

Cons

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More from Longines

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This hour's deals

−45%

Jewelry · WatchMaxx.com

Longines HydroConquest Ref. L3.788.4.06.6

Deal score 8.0 · Steal

$1,290.00$2,350.00 WatchMaxx.com's regular price

You save $1,060.00 at WatchMaxx.com

Deal.ai's agents found this deal on November 6. The store may have changed its price since.

Why it's a great deal

Elsewhere right now: Jomashop.com $1,712.50, Walmart $1,850.00 (typical $1,781.25 across 2 stores)
WatchMaxx.com lists its regular price at $2,350.00: 45% off by its own figures
Rated 4.9 out of 5 by 35 buyers

Visit WatchMaxx.com

Every store we checked

WatchWarehouse.comNew
In stock
$1,248.00Observed at 10:27 AM
Visit store
WatchMaxx.comNew
In stock
$1,290.00Observed at 10:27 AM
Visit store
PrestigeTime.comNew
In stock
$1,830.00Observed at 10:27 AM
Visit store
WalmartNew
In stockSold by WatchMaxx
$1,850.00Observed at 10:27 AM
Visit store

Price history and every store's price →

Reading WatchMaxx.com’s product page for the details…

Specs

Case diameter: 42 mmSource
Case thickness: 11.70 mmSource
Case material: SteelSource
Bezel material: CeramicSource
Crystal: SapphireSource
Water resistance: 300 MetresSource
Movement: AutomaticSource
Caliber: L888.5Source
Power reserve: 72 Hours ApproxSource
Dial color: GreenSource

About the Longines HydroConquest Ref. L3.788.4.06.6

Pros

Ceramic bezel resists fading and scratches
300 m water resistance with a screw-down crown
L888.5 movement with about 72 hours of reserve
Sapphire crystal and solid steel bracelet
Slim 11.7 mm case for a 300 m diver

Cons

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What reviewers say

4.9 / 535 ratings

Owners of the current HydroConquest generally rate it as a solid value diver, praising the ceramic bezel, finishing and movement. Common complaints are the size and weight and the clasp, which feels basic next to pricier divers.

Pros

Ceramic bezel and clean dial
Accurate L888 movement with long reserve
Good bracelet and case finishing for the price

Cons

Heavy on the wrist
Clasp feels less refined than the rest
42 mm too big for some wrists

Questions and answers

Is the Longines HydroConquest worth $3,350?: At $3,350 it is priced at the top of its recent range, and only one store lists it new. It is a fair price for a ceramic-bezel Swiss automatic diver, but there is little room to shop around right now.
How does it compare with the previous HydroConquest?: This generation moved to a ceramic bezel and the L888.5 movement with about 72 hours of reserve, up from the older aluminum bezel and shorter reserve. The case is also slimmer than earlier 41 mm models.
Is 42 mm too big for a small wrist?: At 42 mm wide and 11.7 mm thick, it suits wrists around 6.75 inches and up. Under that, the lugs may overhang, and the 180 g weight is noticeable.
Can I swim and dive with it?: Yes. It is rated to 300 m with a screw-down crown, so swimming, snorkeling and recreational diving are fine. Rinse it with fresh water after salt water use.
What is in the box?: The watch on its steel bracelet, a Longines box and warranty card. The international warranty covers the movement for five years.
When is the best time to buy it?: With one new listing at $3,350, there is no discount to wait for. Watch for holiday sales or gray-market listings, and check the warranty source before buying.