Swiss watch brand Longines has expanded its best-selling HydroConquest line with new variations featuring a GMT complication, a first for this illustrative collection launched in 2007. This function allows the time to be displayed simultaneously in two time zones.


The HydroConquest GMT combines multiple timezone function, useful to all travellers, with the features of underwater sports watches.

Dressed in a 41mm diameter stainless steel case, the new generation HydroConquest fuses retro-inspired design with the latest technological advances.

This timepiece houses the exclusive new Longines L844.5 GMT calibre equipped with 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. This highly precise self-winding calibre offers a power reserve of up to 72 hours.

Longines HYDROCONQUEST GMT watch brown dial and steel bracelet

The new HydroConquest GMT watch also features a new unidirectional notched ceramic bezel fitted with a luminescent capsule and a screw-in crown. The screw-down stainless- steel case back has been redesigned.

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-tone 24-hour scale.

Longines HYDROCONQUEST GMT watch with black dial and steel bracelet

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.

Longines HYDROCONQUEST GMT watch with green dial and steel bracelet

Water-resistant to 30 bar (300metres), 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.

Longines HYDROCONQUEST GMT watch with blue dial and steel bracelet

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 Longines HYDROCONQUEST GMT watch model’s suggested retail price is $2,675/- with a NATO strap, and $2,775/- with a stainless steel bracelet or rubber strap.

Technical details


Reference numbers
L3.790.4.06.2 / 6
L3.790.4.66.2 / 6
L3.790.4.56.6 / 9
L3.790.4.96.6 / 9

Calibre L844.5
Self- winding mechanical movement
11½ lines
21 rubies
25,200 vibrations per hour
Silicon balance-spring
Power reserve: up to 72 hours

Hours, minutes, seconds and date at 3 o’clock
GMT function (24-hour hand)

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
Water resistance: Up to 30 bar (300 metres)

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

Bracelet and Straps
Stainless steel with double-safety folding clasp and micro-adjustment
Khaki green NATO with buckle on green-dial model
Beige NATO with buckle on brown-dial model
Black rubber with double-safety folding clasp and micro-adjustment on black-dial model
Blue rubber with double-safety folding clasp and micro-adjustment on blue-dial model

[View the teaser of Longines HYDROCONQUEST GMT]