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Round 41 mm stainless steel dive watch with black dial, green ceramic bezel insert and green nylon NATO strap

Longines

Longines HydroConquest Automatic 41 mm Black Dial Green NATO Strap L3.781.4.05.2 watch

SKU CH-KBG7-99MCM MPN L3.781.4.05.2

A 41 mm stainless steel dive watch with a Swiss automatic movement, 300 m water resistance, 72-hour power reserve, and a green nylon NATO strap

  • Product seriesHydroConquest
  • Watch movementSwiss Automatic
  • Design styleLuxury
  • Product shapeRound
  • Watch face colorBlack
  • Dial materialMetal
  • Swiss automatic movement delivers 72-hour power reserve
  • 300 m water resistance suits serious diving
  • Green ceramic bezel insert resists scratches
  • Green nylon NATO strap offers secure comfort
  • 41 mm stainless steel case balances presence and wearability

Diver's tool with 300 m rating

The Longines HydroConquest L3.781.4.05.2 is a 41 mm stainless-steel dive watch powered by the automatic calibre L888. It offers a 72-hour power reserve and a uni-directional rotating bezel with a green ceramic insert. The screw-down crown and sapphire crystal seal the case to 300 metres. A green nylon NATO strap secures it with a signed buckle.

Upgrade from basic water-resistant watches

The jump is worth it when you need ISO-grade dive performance instead of splash resistance. The solid caseback, 11.90 mm case thickness and 25,200 vibrations per hour movement deliver the reliability demanded by water-sport enthusiasts. Buyers who only need a desk accessory will not use the depth rating or the legible Arabic markers at 6, 9 and 12 o'clock.

Fits a 21 mm strap slot and frees the wrist

The 21 mm band width matches standard NATO hardware so no proprietary lugs are required. The 41 mm diameter suits most adult wrists without overhang. The 72-hour reserve frees the owner from daily winding during weekend rotations. The green dial accents coordinate with the strap for a single-package look.

How it compares

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

Price $1,146.99
Pricier than about 91% of the 2,679 comparable items (median $130.99).

Specifications

Product
Brand nameLongines
Model nameL37814052
Part numberL37814052
Design styleLuxury
Product seriesHydroConquest
Product colorBlack/Silver/Green
Watch face colorBlack
Item conditionNew
Display
Display typeAnalog
Size & build
Main materialStainless Steel/Nylon
Product shapeRound
Dial materialMetal
Strap materialNylon
Strap width21 mm
Closure typeBuckle
Bezel typeUni-directional Rotating
Case constructionSolid
Case size41 mm
Housing materialStainless Steel
Crown typeScrew-Down Crown
Watch glassSapphire Crystal
Environment & compliance
Water resistance300 m
More details
Watch movementSwiss Automatic
Dial markingsArabic
Date displayDate
Suitable forMale
Age groupAdult

Questions about this item

What lug width does the 41 mm case accept for the NATO strap?

The green nylon NATO strap is 21 mm wide, matching the 21 mm lug width of the 41 mm stainless steel case.

How do I set the date on the L888 movement without damaging the mechanism?

Pull the screw-down crown to the first position after unscrewing it; advance the date only when the hour hand is between 11 and 12 to avoid the date-change window.

When will the L888 automatic calibre need a full service?

Longines recommends a complete movement service every 4 to 5 years to replace lubricants, check the 72-hour power reserve and verify the 300 m water resistance seals.

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