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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

  • StyleLuxury
  • Series NameHydroConquest
  • MaterialStainless Steel/Nylon
  • MovementSwiss Automatic
  • ColorBlack/Silver/Green
  • DesignLuxury
  • 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.

Highlights

  • 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

Specifications

BrandLongines
ModelL37814052
Part NumberL37814052
StyleLuxury
Series NameHydroConquest
MaterialStainless Steel/Nylon
MovementSwiss Automatic
ColorBlack/Silver/Green
DesignLuxury
ShapeRound
Dial ColorBlack
Dial MaterialMetal
Dial MarkersArabic
DisplayAnalog
DateDate
Band MaterialNylon
Band Width21 mm
FastenerBuckle
GenderMale
AgeAdult
ConditionNew
BezelUni-directional Rotating
Case BackSolid
Case Diameter41 mm
Case MaterialStainless Steel
Case Thickness11.90 mm
CrownScrew-Down Crown
CrystalSapphire Crystal
Water-Resistant300 m
Special FeaturesScratch-resistant

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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