The story · Since 1954
The story of the Longines HydroConquest
Longines launched the HydroConquest in 2007 as a more modern dive watch beside the retro Legend Diver. Nineteen years later its third generation arrived in 39 mm and 42 mm, rated to 300 metres, and on a Milanese bracelet for the first time.
- 1954 to 2006 A name registered in 1954 The HydroConquest borrows its name from the Conquest, the first Longines collection whose name was protected in Switzerland, in 1954.
- 2007 to 2017 The modern diver of Saint-Imier Longines returned to dive watches in 2007 with two lines at once: the retro Legend Diver and the HydroConquest.
- 2018 to 2019 Ceramic replaces aluminium At Baselworld 2018 Longines gave the HydroConquest a ceramic bezel insert matched to sunray black, grey or blue dials, in 41 mm and 43 mm, plus a 41 mm chronograph.
- 2019 to 2022 Black ceramic, green, two-tone A matte black version with a full zirconium oxide ceramic case arrived in 2019 at 43 mm.
- 2023 to 2024 A GMT and softer lines In 2023 the line gained its first GMT, the L844.5 calibre, in a 41 mm case with rounded crown guards and no more numerals on the dial.
- 2026 Third generation, 39 and 42 In March 2026 the time-and-date diver moved to the new design in 39 mm and 42 mm, with a bezel action borrowed from the Ultra-Chron Diver and twelve standard references.
300 m
300 m: water resistance of the third-generation HydroConquest (2026)
Worn by
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Chapters
- 1954 to 2006
A name registered in 1954
The HydroConquest borrows its name from the Conquest, the first Longines collection whose name was protected in Switzerland, in 1954. Revolution describes the diver as a logical evolution of that line rather than a showpiece.
- 2007 to 2017
The modern diver of Saint-Imier
Longines returned to dive watches in 2007 with two lines at once: the retro Legend Diver and the HydroConquest. The HydroConquest was initially sold in automatic and quartz versions, with characteristic numerals at 6, 9 and 12.
- 2018 to 2019
Ceramic replaces aluminium
At Baselworld 2018 Longines gave the HydroConquest a ceramic bezel insert matched to sunray black, grey or blue dials, in 41 mm and 43 mm, plus a 41 mm chronograph. In February 2019 Aaron Kwok unveiled the ceramic models in Singapore.
- 2019 to 2022
Black ceramic, green, two-tone
A matte black version with a full zirconium oxide ceramic case arrived in 2019 at 43 mm. Green dials followed in 2020, and in 2021 two-tone models with gold or rose gold PVD bezels and crowns, using the L888.5 calibre with a silicon hairspring.
- 2023 to 2024
A GMT and softer lines
In 2023 the line gained its first GMT, the L844.5 calibre, in a 41 mm case with rounded crown guards and no more numerals on the dial. Its redesigned H-link bracelet brought the first micro-adjusting clasp at Longines; a 43 mm GMT followed in 2024.
- 2026
Third generation, 39 and 42
In March 2026 the time-and-date diver moved to the new design in 39 mm and 42 mm, with a bezel action borrowed from the Ultra-Chron Diver and twelve standard references. Henry Cavill fronted the campaign, shot on Atlantic shores.
Worn by
The Hong Kong singer and actor, a Longines ambassador since 2005, wore a new HydroConquest with a blue ceramic bezel to open the brand's Marina Bay Sands boutique in Singapore in February 2019, and said he liked its ceramic insert.
The actor, a Longines ambassador since 2025, wore the new 39 mm HydroConquest in the 2026 campaign for the third generation; British GQ noted the watch on his wrist.
Moments
2026. The third generation introduced a Milanese mesh bracelet to the HydroConquest; Fratello noted that it tapers, which is rare for this type of bracelet.
2023. The HydroConquest GMT's bracelet was the first at Longines fitted with a micro-adjusting clasp, which can also be opened out over a wetsuit cuff.
2019. Aaron Kwok led fans and press from the new Longines boutique at Marina Bay Sands to the rooftop of the Fullerton Bay Hotel, where the ceramic HydroConquest models were unveiled.
Generations and strap changes
- 2026Third generation, 39 and 42 mm
New time-and-date models with L888.5 (72 hours), 11.7 mm thick, in six colourways and two sizes.
The 42 mm has 21 mm lug spacing and the 39 mm takes a 20 mm bracelet; H-link or Milanese mesh bracelets with push-button micro-adjust, without quick-release pins.
- 2024HydroConquest GMT, 43 mm
Larger 43 mm GMT versions in green, black and blue.
Bracelets with double-safety folding clasp and micro-adjustment, or blue and black rubber straps.
- 2023HydroConquest GMT, 41 mm
First GMT of the line, calibre L844.5 with an independently set local hour hand, 41 mm by 12.9 mm, with a redesigned case and dial.
New H-link bracelet with Longines' first micro-adjusting clasp, also on rubber or NATO-style straps; lug width 21 mm.
- 2022Ref. L3.780 (39 mm ceramic)
A 39 mm ceramic-bezel version with the L888.5 calibre and a 12.2 mm case height.
WatchBase and Delugs give a 19 mm lug width for this 39 mm case.
- 2019Black ceramic, 43 mm
Case, bezel, dial and clasp in black zirconium oxide ceramic, 43 mm, L888.3 calibre, on a black rubber strap.
Delivered on a black rubber strap whose folding clasp is also black ceramic.
- 2018Ref. L3.781 and L3.782 (ceramic)
Ceramic bezel insert, 41 mm (L3.781) and 43 mm (L3.782), with the L888.2 calibre; a 41 mm chronograph (L3.783) used the column-wheel L688.2.
The 41 mm ceramic models have a 21 mm lug width; the bracelet narrows to a 20 mm clasp, and matching rubber straps were offered.