New: Longines Hydroconquest GMT

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Longines expand their classic sports watch Hydroconquest line with new models with a GMT complication.

Press Release details with commentary in italics.

New: Longines Hydroconquest GMT

The pricing for the Longines Hydroconquest GMT is SGD 4,160 for the steel bracelet and rubber strap models (L3.790.4.06.6, L3.790.4.56.6, L3.790.4.66.6, L3.790.4.96.6, L3.790.4.96.9, L3.790.4.56.9) and SGD 4,030 for the NATO strapped models (L3.790.4.06.2, L3.790.4.66.2).


The Hydroconquest is Longines proposal for the sports/tool watch market. The new models now have a GMT function to display two timezones simultaneously. This the first time the GMT complication is included in the collection since it was launched in 2007.

A total of 8 novelties are released in a variety of 4 different dial options. Each dial is available with a stainless steel bracelet and either in a NATO strap or with a rubber bracelet. Interestingly, the metal bracelet and rubber strap versions are offered at the same retail price, while the NATO strap versions are slightly less expensive.

The case is 41mm stainless steel with screw down back and crown with a new unidirectional notched bezel in black ceramic with luminescent capsule. The 300m water resistance rating gives the Hydroconquest diving credibility, as well as the toughness needed for use as a tool watch. And combined with its handsome good looks, makes it a good candidate as the weapon of choice for the urban warrior.

The movement uses a silicon balance spring with amagnetic properties that meet the ISO 764 standard. The Calibre L844.5 is an ETA derived movement exclusive to Longines.

Release details

The HYDROCONQUEST collection has been redesigned and now features an exclusive Longines GMT movement

A true classic among sports watches, the HYDROCONQUEST line has been expanded with new models featuring a sleek design and an exclusive Longines GMT movement. Combining technical excellence and elegance, two hallmarks of the winged hourglass brand, these new versions have taken inspiration from the world of water sports, while drawing on Longines’ historic expertise in developing watches with multiple time zones.

Longines is expanding its HydroConquest line with new variations featuring a GMT complication, a first for this emblematic collection launched in 2007. This function allows the time to be displayed simultaneously in two time zones. This complication is linked to a rich heritage: Longines introduced the concept on a wristwatch as early as 1925.

The HydroConquest GMT combines this function, useful to all travellers, with the underwater sports codes that personify it. It’s aimed at modern-day adventurers who love discovery, and at demanding sportsmen and women, and will accompany them wherever they go.

For this new generation of watches, Longines has fused retro-inspired design with the latest technological advances. The 41 mm diameter screw-down stainless-steel case back has been redesigned. It features the exclusive new Longines GMT calibre equipped with a silicon balance-spring and innovative components in non-magnetic materials. This movement is ten times more resistant to magnetic fields than the ISO 764 benchmark standard. It is extremely precise and has a power reserve of up to 72 hours.

The HydroConquest GMT is also distinguished by its new unidirectional notched ceramic bezel fitted with a luminescent capsule and a screw-in crown. The alternating polished and satin-finished surfaces add a sophistication and elegance to these new models. The green, brown, black and blue sunray dials are enhanced by a two-tone24-hour scale. The gilt or silvered polished hands and hour-markers are coated with Super-LumiNova®, making them easy to read in any circumstances. They are round at 6 and 9 o’clock and triangular at 12 o’clock. At 3 o’clock, the date window shows the date. The arrow-shaped GMT indicator matches the colour of the dial decals. 

Water-resistant to 30 bar (300 metres), the HydroConquest GMT models are fitted with a stainless-steel bracelet with completely redesigned H-shaped links. It is also, for the first time at Longines, equipped with a micro-adjusting clasp. Complementing the colours of the dials, the new watches are also available with a blue or black rubber strap with micro-adjusting folding clasp for perfect fit and comfort. A NATO bracelet in khaki-green or beige is also available. 

The new HydroConquest GMT is perfect for every adventure. The world is truly your playground!

Longines Hydroconquest GMT specifications


Self-winding mechanical movement

Calibre L844.5

11½ lines, 21 rubies, 25,200 vibrations per hour with silicon balance-spring

Power reserve:  up to 72 hours


Hours, minutes, seconds and date at 3 o’clock

GMT function (24-hour hand)


Diameter 41 mm, 12.90 mm thick

Round, stainless steel

Sapphire crystal with multi-layer anti-reflective coating on both sides

Unidirectional rotating ceramic bezel equipped with a Super-LumiNova® treated capsule on triangle at 12 o’clock 

Screw-in crown

Screw-down case back 


Green sunray with offset 24-hour scale, Brown sunray with offset 24-hour scale, Black sunray with offset 24-hour scale, Blue sunray with offset 24-hour scale

Applied hour markers, with Super-LumiNova® treatment


Gilt polished, with Super-LumiNova® treatment

Silvered polished, with Super-LumiNova® treatment


Up to 30 bar (300 metres)


Stainless steel with double-safety folding clasp and micro-adjustment available on all dial variants

Khaki green NATO with buckle on green-dial model 

Beige NATO with buckle on brown-dial model

Black rubber strap on black-dial model

Blue rubber strap on blue dia-dial model


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