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INTRODUCING: Longines HydroConquest GMT

The Longines HydroConquest GMT in steel with black dial and bezel.

Longines updates the HydroConquest collection with a few design tweaks and a new exclusive GMT calibre.

When Longines introduced its HydroConquest collection in 2007, it was riding a wave of sports and diving watches gaining popularity among collectors. The HydroConquest has proven to be highly functional as a tool watch with obvious but unintrusive diving features. Its stylish versatility adds to its appeal, and the addition of a GMT complication to its latest model enhances it further.

The HydroConquest gets its dashing good looks from Longines' Conquest line. One of the earliest examples of ‘modern’ wristwatches when it was launched in 1954 – i.e., automatic movement, shock- and water-resistant – the original Conquest was undeniably a dress watch with its smaller dimensions, minimalist dial, diamond-shaped indexes, and dauphine hands.

An old model of the Longines HydroConquest in steel with black bezel insert.
An old model of the Longines HydroConquest in steel with black bezel insert.

With the HydroConquest, the watchmaker added a rugged and sporty dimension to the Conquest’s already successful architecture. It was aimed squarely at recreational divers and those who wanted to emulate that look. As one of Longines’ four Sport collections, the HydroConquest is well-equipped for underwater adventures with a 300m water resistance thanks to a screw-down caseback, and  Super-LumiNova-filled hour markers for optimum legibility.

The Longines HydroConquest GMT in 2023 with green dial and bezel.
The Longines HydroConquest GMT in 2023 with green dial and bezel.

Longines is expanding its HydroConquest line this year with new models featuring a GMT complication, a first for this emblematic collection. This complication is linked to the brand’s rich heritage, as it introduced the concept on a wristwatch as early as 1925. The new HydroConquest GMT is aimed at modern-day adventurers and discerning sportsmen and women, enabling them to keep track of their home time even from far-flung locations.

The Longines HydroConquest GMT features new design tweaks.
The Longines HydroConquest GMT features new design tweaks.

There are several changes to the HydroConquest that follows the re-design of the Conquest collection for 2023. The 41mm stainless-steel case features a new unidirectional notched ceramic bezel fitted with a luminescent capsule and a screw-in crown. The crown guards are also sized down and rounded off, unlike its sharply angled predecessors. It’s also widened the notches around the bezel for easy operation and design breathability. Most importantly, it’s shortened the lugs of the case. All these serve to transform the overall dimensions of the watch, giving it greater balance around the middle and better curvature along the sides.  

The four dials of the Longines HydroConquest GMT are in blue, brown, black, and green.
The four dials of the Longines HydroConquest GMT are in blue, brown, black, and green.

The HydroConquest GMT retains a diving scale on the bezel insert instead of a 24-hour display. The latter is printed on the inner bezel or rehaut with a two-tone colouring to distinguish day and night time. The dial has also been pared down for legibility. Available in four sunray-finished dial colours – black, blue, brown, and green – the HydroConquest GMT opts for diving-style dot, arrow, and bar indexes instead of oversized Arabic numerals. A prominent arrow-shaped GMT hand matches the colour of the dial decals. The watches are offered on a stainless-steel bracelet featuring newly redesigned H-links that are shorter and fit better, and NATO or rubber strap options.  

The closed caseback of the Longines HydroConquest GMT is stamped with the logo of the winged hourglass.
The closed caseback of the Longines HydroConquest GMT is stamped with the logo of the winged hourglass.

Inside, the watch ticks the exclusive new ETA-based Calibre L844.5 with a silicon balance spring and innovative components in non-magnetic materials. As is the case with the Spirit Zulu Time, the movement allows for an independently adjustable local hour hand. Ten times more resistant to magnetic fields than the ISO 764 benchmark standard, the calibre is extremely precise and has a power reserve of up to 72 hours.  

Whichever way you go, this diving watch is great buy for anyone looking to get into the diver-GMT game.

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