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Longines HyroConquest L3.788.4.56.6

42 mm, Automatic, Stainless steel

Longines HydroConquest L3.788.4.56.6 is a professional diving watch combining robust construction and modern materials. The 42 mm stainless steel case is paired with a unidirectional ceramic bezel offering high scratch resistance. The black lacquered dial with applied markers and Super-LumiNova® coating ensures good legibility in low-light conditions. Detailed product description

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Product description

Longines HydroConquest L3.788.4.56.6 is a professional diving watch combining robust construction and modern materials. The 42 mm stainless steel case is paired with a unidirectional ceramic bezel offering high scratch resistance. The black lacquered dial with applied markers and Super-LumiNova® coating ensures good legibility in low-light conditions.

The watch is powered by an automatic Longines L888 movement operating at 25,200 vibrations/hour (3.5 Hz) with a power reserve of up to 72 hours. It features a silicon balance spring for improved resistance to magnetic fields and enhanced rate stability. The sapphire crystal with anti-reflective coating protects the dial and reduces glare.

The construction includes a screw-down crown and screw-down case back, ensuring water resistance of 300 m (30 bar) in line with diving watch standards. The stainless steel bracelet with a folding clasp and diving extension provides secure and comfortable wear. This model is designed for users seeking technically specified Swiss diving watches with high durability and stable performance.

Files for download

Instruction_manual_Longines_L888_en.pdf

Product specifications

Producer: Longines
Supplier code: L3.788.4.56.6
Collection HydroConquest
Watch style Luxury, Sports, Diving
Intended for Men’s
Warranty 5 years
Water resistance i 300 m
Weight 180 g
Case size 42 mm
Case Thickness 11,7 mm
Case material Stainless steel
Case features Screw-in crown i, Screw-down caseback
Crystal Sapphire glass with double-sided anti-reflective coating i
Bezel High-tech ceramic, Unidirectional rotating (anticlockwise)
Lug Width i 21 mm
Dial Analog
Dial color Black
Hour markers Indexes
Luminiscence i Hands and indices, Super-LumiNova ®
Movement Self-Winding i
Calibre Caliber L888.5
Power reserve ~72 h
Functions Date
Frequency 25 200 vph (3,5 Hz) i
Movement accuracy i approx. −5 to +15 s/day
Balance spring Silicon i
Anti-shock system i Yes
Strap color Silver
Strap material Stainless steel
Clasp type Folding clasp i
Clasp material Stainless steel
Quick-release system No i
Longines HyroConquest L3.788.4.56.6

Elegance underwater

Longines HydroConquest

The Longines HydroConquest collection represents the pinnacle of sporty elegance and is designed for those who seek performance, reliability and durability combined with the unmistakable Longines design. This watch pays homage to the world of diving and adventure, while maintaining the typical aesthetics of Swiss tradition.

The HydroConquest models feature a robust stainless steel, ceramic or titanium case, water resistance up to 300 metres and a unidirectional rotating lunette for safe underwater timekeeping. The dials in shades of blue, black, grey or green are complemented by luminescent hands and indices that ensure perfect legibility even in the depths of the ocean.

Precision Swiss automatic movements with high precision and long power reserve work inside the watch. The Longines HydroConquest is the ideal choice for the modern adventurer who expects maximum performance but never gives up elegance - whether underwater or on land.

Longines HyroConquest L3.788.4.56.6

Elegance that endures time

Longines

The Longines brand is synonymous with traditional Swiss watchmaking, combining technical excellence with effortless elegance. Since its founding in 1832 in Saint-Imier, Switzerland, Longines has built a reputation as one of the most respected luxury watch manufacturers in the world. With its signature sandstone wings logo and motto "Elegance is an attitude", the brand symbolises taste, precision and style that appeals to generations around the world.

Each Longines model is the result of precise craftsmanship and an innovative approach, combining tradition with modern technology. Collections such as Master, Conquest, HydroConquest, Spirit and DolceVita reflect the brand's diversity - from sporty performance to sophisticated elegance.

Thanks to its commitment to excellence and its long-standing involvement in sports timekeeping, Longines has become an ambassador of precision and beauty. Whether you're looking for a watch for everyday wear or an exceptional jewel for a lifetime, Longines offers timepieces that never lose their allure - just like the moments they capture.

Longines HyroConquest L3.788.4.56.6

Longines HyroConquest L3.788.4.56.6

On request:
Availability on request

55 700