ince its introduction in 2007, the HydroConquest collection has embodied Longines’ distinctive approach to watchmaking, combining robust functionality with the understated elegance that defines the brand. Drawing inspiration from maritime adventure while maintaining timeless design principles, these timepieces have established themselves as sporty companions that transition seamlessly from active pursuits to elegant occasions.

For 2026, Longines presents a comprehensively reimagined HydroConquest line featuring automatic models in two versatile sizes. The 39-mm and 42-mm stainless-steel cases deliver contemporary proportions that balance presence with wearability, while refined details throughout the collection speak to Longines’ commitment to horological excellence.

The redesigned dial showcases an elegant aesthetic, with new applied indices treated with Super-LumiNova^® for exceptional legibility. The collection offers four dial options: polished lacquered finishes in blue, black, and green – each providing depth and visual interest – plus a distinctive frosted-blue sunray variant that creates a captivating play of light across its textured surface. Five ceramic bezel colours frame these dials: classic black, blue and slate grey are joined by two vibrant new shades – verdant green and luminous blue – allowing numerous dial and bezel combinations.

The reworked unidirectional rotating bezel system, borrowed from the Ultra-Chron Diver model, delivers enhanced tactile feeling. A new Super-LumiNova^® capsule at the time “0” position on the bezel brings optimal visibility in all lighting conditions. With a screw-in crown and robust construction, these timepieces offer a water resistance of up to 30 bar (300 metres).

At the heart of each watch beats the Longines exclusive calibre L888.5, a self-winding mechanical movement featuring a silicon balance-spring and innovative components that deliver exceptional precision, making it up to ten times more resistant to magnetic fields than ISO 764 standards require – a crucial advancement for modern timepieces regularly exposed to magnetic interference. With a power reserve of up to 72 hours, this movement exemplifies Longines’ dedication to both performance and reliability.

The screw-down case back now bears the same refined Longines logo, in a design familiar to GMT models launched in 2023, featuring a planisphere engraving that subtly connects this collection to Longines’ heritage of equipping explorers and adventurers. This design continuity extends to the bracelet, with three models presented on stainless-steel featuring elegant H-shaped links, the same sophisticated design introduced with the GMT models. These bracelets incorporate a double-folding safety clasp with a micro-adjustment system, offering four adapting ranges for personalised comfort.

Marking a significant innovation for the collection, three additional references debut on Milanese mesh bracelets crafted from high-quality stainless steel. Featuring a full-brushed finishing with polished sides, these bracelets complete the sophisticated explorer aesthetic that seamlessly bridges heritage and modernity.

The tapered mesh construction offers exceptional comfort and breathability, and the micro-adjustment clasp ensures an impeccable fit. Improved shortening links allow for easy personalisation, making these bracelets as practical as they are elegant.

With its blend of technical excellence and refined design, the new HydroConquest embodies a spirit of freedom and purposeful movement. These are timepieces for individuals who navigate between worlds – between land and sea, between adventure and elegance – with equal confidence and grace.

Two striking 39-mm and 42-mm references, featuring frosted-blue dials, are available exclusively through Longines Corporate Boutiques, Shop in Shops and the brand’s e-commerce platform. These models, showcase a captivating interplay of light across their sunray textured dial surfaces, creating depth and visual interest that evolves throughout the day.

The frosted-blue finish provides a contemporary marine-in- spired interpretation moving beyond literal representation to capture the essence of water through colour and texture. Paired with dark-blue ceramic bezels and presented on stainless-steel bracelets with micro-adjustable, double-folding safety clasps, these exclusive models offer collectors and enthusiasts distinctive variants that stand apart from the core collection while maintaining the technical excellence and sporty elegance that define HydroConquest.

TECHNICAL SPECIFICATIONS

REFERENCE NUMBERS L3.779.4.06.6 / L3.779.4.56.6 / L3.779.4.96.6 • L3.779.4.70.6 / L3.779.4.90.6 / L3.779.4.99.6 • L3.788.4.06.6 / L3.788.4.56.6 / L3.788.4.96.6 • L3.788.4.70.6 / L3.788.4.90.6 / L3.788.4.99.6

CALIBRE Self-winding mechanical movement • Exclusive Longines calibre L888.5 • Resistant to magnetic fields (ISO 764), with silicon balance-spring • 111⁄2 lines, 21 jewels, 25 200 vibrations per hour • Power reserve: up to 72 hours

FUNCTIONS Hours, minutes, seconds • Date aperture at 3 o’clock

CASES ⌀ 39 mm; thickness 11.70 mm • ⌀ 42 mm; thickness 11.70 mm • Round, stainless steel • Sapphire crystal with multi-layer anti-reflective coating on both sides • Unidirectional rotating bezel with blue, black, verdant green, slate grey, luminous blue ceramic insert, count up scale, featuring a SuperLumiNova^® filled capsule on the triangle at time “0” • Screw-in crown • Brushed screw-down case back, with planisphere and Longines logo engraving • Distance lug to lug: ⌀ 39 mm: 48.10 mm / ⌀ 42 mm: 51.20 mm • Distance between lugs: ⌀ 39 mm: 20 mm / ⌀ 42 mm: 21 mm

DIALS Blue, black, green lacquered polished, 11 applied rhodium-plated indexes with Super-LumiNova^® treatment • Frosted blue sunray, 11 applied rhodium-plated indexes with Super-LumiNova^® treatment for ref. L3.779.4.99.6 / L3.788.4.99.6

HANDS Rhodium-plated and polished, with Super-LumiNova^® treatment

WATER RESISTANCE Up to 30 bar (300 metres)

BRACELETS Stainless steel with double-folding safety clasp, push-piece opening mechanism; micro-adjustment • Stainless steel Milanese mesh with double-folding safety clasp, push-piece opening mechanism; micro-adjustment