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Longines

Longines HydroConquest Automatic 43 mm Stainless Steel Gray Dial Rubber Strap Watch L3.782.4.76.9

SKU CH-QB8J-WD72X MPN L3.782.4.76.9

A 43 mm stainless steel dive watch with a gray ceramic bezel, sapphire crystal, 300 m water resistance and a 72-hour power reserve automatic movement on a rubber strap

  • Product seriesHydroConquest
  • Watch movementAutomatic
  • Design styleLuxury
  • Product shapeRound
  • Watch face colorGray
  • Dial materialMetal
  • Swiss automatic caliber L888 delivers 72 hours power reserve
  • 300 m water resistance suits serious diving
  • Scratch-resistant sapphire crystal protects the gray dial
  • Uni-directional ceramic bezel tracks elapsed time safely
  • Double safety folding clasp secures the rubber strap

HydroConquest 43 mm Automatic Diver

The HydroConquest is a 43 mm stainless-steel dive watch built for men who want a reliable Swiss automatic for water sports and daily wear. Its uni-directional rotating bezel with a gray ceramic insert and 300 m water resistance meet professional diving requirements. The gray sunray dial carries Arabic numerals at 6, 9 and 12 o'clock plus luminescent snowflake hands for legibility underwater. A screw-down crown and solid caseback complete the rugged construction.

Caliber L888 72-Hour Reserve

Inside beats the Longines caliber L888 automatic movement at 25,200 vibrations per hour, delivering up to 72 hours of power reserve when fully wound. The movement runs without a battery, so normal wrist motion keeps it operating through weekends off the wrist. A scratch-resistant sapphire crystal protects the dial from daily knocks, while the solid caseback shields the mechanism from pressure at depth. No special winding routine is required beyond regular wear.

21 mm Rubber Strap Double Clasp

The watch comes on a gray rubber strap 21 mm wide at the lugs, secured by a double safety folding clasp with push-piece release for quick one-handed adjustment. The strap resists salt water, chlorine and UV exposure, making it practical for pool, ocean or deck use. The 11.90 mm case thickness sits low enough to slide under most shirt cuffs without snagging. Buyers needing a metal bracelet or a different lug width will need to source those separately.

How it compares

Measured against everything we stock in Analog & Digital Wristwatches, at today’s prices. Recalculated every night.

Price $1,221.99
Pricier than about 91% of the 2,679 comparable items (median $130.99).

Specifications

Product
Brand nameLongines
Model nameL37824769
Part numberL37824769
Design styleSports
Product seriesHydroConquest
Product colorGray/Silver
Watch face colorGray
Item conditionNew
Display
Display typeAnalog
Size & build
Main materialStainless Steel/Rubber
Product shapeRound
Dial materialMetal
Strap materialRubber
Strap width21 mm
Closure typeDouble safety folding clasp and push-piece opening mechanism
Bezel typeUni-directional Rotating
Case constructionSolid
Case size43 mm
Housing materialStainless Steel
Crown typeScrew-Down Crown
Watch glassSapphire Crystal
Environment & compliance
Water resistance300 m
More details
Watch movementAutomatic
Dial markingsArabic
Date displayDate
Suitable forMale
Age groupAdult

Questions about this item

How do I set the time and date on the L888 automatic movement, and what is the common mistake?

Unscrew the crown counter-clockwise, pull it to position 2 for time and position 1 for date; the frequent error is forgetting to screw the crown back down fully, which breaks the 300 m water resistance.

What part of the 21 mm gray rubber strap will wear out first and need replacement?

The rubber strap itself degrades from salt, UV and skin oils; the double safety folding clasp and push-piece mechanism is metal and typically outlasts the strap.

How long will the L888 calibre keep running if I take the watch off my wrist?

The movement provides up to 72 hours of power reserve at 25,200 vibrations per hour before it stops and requires winding or wear to restart.

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