Illustration. The seconds hand sweeps, like the real movement.
HydroConquest 39 mm
Ref. L3.779.4.99.6
39 mm, frosted blue sunray dial, black ceramic bezel, Milanese mesh bracelet
- Diameter
- 39 mm
- Thickness
- 11.7 mm
- Water
- 300 m
- Movement
- L888
€2,250
Longines' German RRP incl. VAT for this Milanese-mesh reference (longines.com/de-de, September 2026); USD 2,400 in the US.
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Why it's interesting
The 2026 HydroConquest slims down to 11.7 mm and, in this version, comes on a Milanese mesh — a pairing you'd expect from a boutique brand rather than a mainstream diver. The frosted blue dial makes it feel lighter than its 300 m rating suggests.
Watch DNA. Filled tags are editorial; outlined tags come from the specifications.
The numbers
Verified specificationsSize
- Diameter
- 39mm
- Lug to lug
- 48.1mm
- Thickness
- 11.7mm
- Lug width
- 20mm
Because you like this…
Chosen for shape, size, colour, character and price. Rarely the same brand twice.
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About this page
Verified specifications, checked September 2026
Dimensions, water resistance, movement and crystal were checked against the sources below.
Calibre L888.5 and weight per Longines' product sheet. The sheet only says 'bracelet'; the Milanese mesh is confirmed by Longines' official product photo for this reference.
The illustration is a bezelga rendering generated from the specifications. It is not a photograph and may simplify details such as logos, text and finishing.
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