Is the Longines HydroConquest a good first dive watch?

Yes. It gives you a Swiss automatic movement, a ceramic bezel and 300 m water resistance at a price well under most Swiss divers. The main trade-off is its size and weight.

How does it compare with the Tudor Black Bay?

The Tudor has more brand cachet and a stronger resale record. The HydroConquest costs far less, still offers 300 m and a ceramic bezel, and matches it on power reserve at about 72 hours.

Is 43 mm too big for a small wrist?

It can be. At 42–43 mm and about 180 g on the bracelet, it wears large. Try it on if your wrist is under about 6.5 inches.

How often does it need servicing?

Longines generally recommends service every 5 to 7 years for an automatic. Budget a few hundred dollars for that, and expect the watch to run accurately in between.

What comes in the box?

The watch and the manufacturer's packaging. It ships on the steel bracelet, and no extra strap is included.

Is the green dial version worth choosing over black or blue?

The green dial is the same watch underneath, with the same L888.5 movement, ceramic bezel and 300 m rating. Pick it if you want a diver that stands apart from the usual black and blue; the trade-off is that green is a less classic look for resale.

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Longines HydroConquest Ref. L3.788.4.06.6

−34%

Jewelry · Mani Jewellers

Longines diver with serious wrist presence

Name: Longines HydroConquest Ref. L3.788.4.06.6
Brand: Longines
Price: 1455.50 USD
Availability: InStock

Longines HydroConquest Ref. L3.788.4.06.6

A Longines HydroConquest dive watch for collectors who want Swiss heritage on the wrist.

Deal score 5.8 · Good deal

$1,455.50$2,200.00 at Bloomingdale's

You save $744.50 at Mani Jewellers

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Rated 5.0 out of 5 by 28 buyers

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From WatchMaxx.com

Swiss automatic self-winding movement, Longines Caliber L888
Approx. 72 hours power reserve
43mm brushed stainless steel round case, 11.9mm thick
Uni-directional rotating bezel
Scratch resistant sapphire crystal
300 meters / 990 feet water resistant

Materials: Brushed stainless steel case; brushed rose gold PVD coated stainless steel two-tone bracelet; scratch resistant sapphire crystal
Fit: Case diameter 43mm; case thickness 11.9mm
Guarantee: 2 Year WatchMaxx Warranty; minimum 2-year guarantee on most watches, with service or repair by WatchMaxx
Returns: 30 Day Return Policy
Shipping: Free USA standard shipping; in stock and ready to ship; expedited and next day options available at checkout
In the box: Watch, Manufacturer's packaging

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 is a Swiss automatic dive watch with a 300 m rating, a ceramic bezel and a green dial. It runs Longines' L888.5 movement with about 72 hours of power reserve, and the steel case is roughly 42–43 mm across and 11.7–11.9 mm thick. It sits below Tudor and Omega on brand cachet and resale but matches them on water resistance and power reserve. Owners rate it highly and treat it as a strong value Swiss diver.

Best forBuyers who want a Swiss automatic diver without luxury-tier pricingDaily wear with a desk-to-dive lookPeople who want a ceramic bezel on a mainstream Swiss diverShoppers who prefer a bracelet over a strap

Pros

Swiss automatic L888.5 with about 72 hours of power reserve
300 m water resistance and a screw-down crown
Ceramic bezel resists fading and scratches
Sapphire crystal with anti-reflective coating
Solid steel bracelet and case, about 180 g
Green dial stands out from the usual black and blue divers

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