Longines HydroConquest Blue Lacquered Polished Dial Men 42mm L37884966

Merging high-performance aquatic engineering with refined Swiss elegance and contemporary sports styling, the Longines HydroConquest 42mm L37884966 stands as a benchmark in modern professional diving horology. Sculpted in a robust 42.00 mm surgical-grade 316L stainless steel case measuring 11.90 mm in profile with a 21 mm lug spacing, this timepiece features a unidirectional rotating bezel fitted with an ultra-hard, scratch-resistant blue ceramic insert and a luminescent capsule at 12 o'clock. The dial showcases a radiant blue lacquered polished finish that captures ambient light in maritime azure, royal, and deep cobalt reflections. Appointed with applied Arabic numerals at 6, 9, and 12 o'clock, bold round cabochon hour markers, silvered polished hands generously filled with Swiss Super-LumiNova, and a framed date window at 3 o'clock, the display ensures optimal legibility in deep aquatic conditions. Engineered for rigorous underwater missions, the watch is equipped with a screw-in crown flanked by lateral crown guards and a solid screw-down case back adorned with the embossed Longines winged hourglass emblem, guaranteeing an impressive 300 metres (30 bar / 1,000 feet) of water resistance. At its mechanical heart beats the exclusive Longines self-winding Calibre L888, featuring a monocrystalline silicon balance-spring for enhanced magnetic resistance and delivering an autonomous 72-hour (3-day) power reserve. Mounted on an integrated 3-row stainless steel bracelet with a double safety folding clasp and diving extension, it is backed by Longines’ official 5-year international manufacturer warranty.

Key Highlights

• Ultra-Hard Blue Ceramic Bezel: Unidirectional rotating 120-click steel bezel fitted with a scratch-resistant polished blue ceramic insert and a luminescent dot at 12 o'clock.

• 300-Metre (30 ATM / 1,000 ft) Water Resistance: Professional-grade pressure rating secured by a screw-in winding crown, heavy-duty gaskets, and a screw-down solid case back.

• Exclusive Automatic Calibre L888: Swiss mechanical movement operating at 25,200 vibrations per hour (3.5 Hz) across 21 jewels with an extended 72-hour (3-day) power reserve.

• Monocrystalline Silicon Balance-Spring: Advanced antimagnetic silicon hairspring delivering high chronometric precision, temperature stability, and extended service intervals.

• Radiant Blue Lacquered Polished Dial: Deep maritime blue glossy dial offering vivid color saturation and dramatic radial light reflection.

• Swiss Super-LumiNova Nocturnal Luminescence: Thickly applied luminescent treatment across the silvered hands, applied Arabic numerals (6, 9, 12), and circular hour markers for low-light diving readability.

• Double Anti-Reflective Sapphire Crystal: Scratch-resistant sapphire glass coated with multiple layers of anti-reflective coating on both inner and outer surfaces.

• Ergonomic 42.00mm Case Proportions: Confident 42 mm diameter and 11.90 mm thickness engineered with faceted crown guards for sports presence and wrist stability.

• Solid Screw-Down Case Back: Screwed steel case back stamped in high relief with the historic Longines winged hourglass emblem.

• Solid Stainless Steel 3-Row Bracelet: Brushed outer links and mirror-polished center rows providing structural strength and wrist comfort.

• Double-Safety Folding Clasp with Diving Extension: Secure deployant buckle equipped with dual push-pieces and an integrated wetsuit extension.

• Official 5-Year International Warranty: Comprehensive worldwide manufacturer guarantee supported by Longines' global service network.

Design & Craftsmanship

Saint-Imier Aquatic Heritage & The 42mm Steel Case Architecture

Founded in 1832 in Saint-Imier, Switzerland, Longines has built a legacy at the crossroads of performance, precision, and elegance. The HydroConquest line represents the brand’s technical diving collection, engineered to meet the stringent demands of underwater exploration while maintaining refined aesthetics for daily wear. In reference L3.788.4.96.6, Longines utilizes high-grade 316L stainless steel for a 42.00 mm diameter case with a 11.90 mm profile. The case flanks combine satin brushing with mirror-polished beveled accents. Crowning the case is a unidirectional rotating diver's bezel with an ultra-hard, scratch-resistant blue ceramic insert that will not fade or oxidize over time. The screw-in winding crown is protected by prominent angled crown guards, and the solid case back is threaded to the chassis to seal the watch against pressures up to 300 metres (30 bar / 1,000 feet).