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Generated illustration of the Longines HydroConquest 39 L3.779.4.56.6: round case, 39 mm, black lacquer dial, rotating dive bezel, bracelet strap.

Plate 252. Illustration generated from this record, not a photograph. No lettering or logos. Colours are approximate. Same scale on every plate.

a Bezel
rotating dive, black ceramic
b Dial
black lacquer, markers: batons, with date
c Case
stainless steel, round
d Strap
bracelet, steel

Longines · Dive

HydroConquest 39

Ref. L3.779.4.56.6

Machine translation pending human review. Figures and sources match the original.

A version of the HydroConquest reduced to 39 mm, with the same water resistance.

US$2,200

Official list price · Nov 2026 · Source: longines.com

Official site

Why it matters

  • 39 mm
  • 300 m
  • Double safety clasp with micro-adjustment

Specifications

Line
HydroConquest
Year
unconfirmed
Status
In production
Range
Mid-range
Diameter
39 mm
Thickness
unconfirmed
Material
stainless steel
Shape
round
Dial
black lacquer
Markers
batons
Date
Yes
Bezel
rotating dive, black ceramic
Strap
bracelet, steel
Calibre
unconfirmed
Movement
Automatic
Power reserve
72 h
Frequency
25,200 vph
Jewels
unconfirmed
Water resistance
300 m
Complications
hours, minutes, seconds, date

Across the Archive

Diameter39 mmAbove 26% of 447 watches with this figure
Thicknessunconfirmed
Power reserve72 hAbove 72% of 348 watches with this figure
Frequency25,200 vphAbove 29% of 274 watches with this figure
Water resistance300 mAbove 89% of 386 watches with this figure
PriceUS$2,200 · Nov 2026Above 50% of 127 prices in USD. Log scale.

Where to buy

A search for this reference at retailers. TicTemple does not sell watches or check stock. Links go live once we join each programme.

Sources

  1. longines.com

Record confidence: high. Based on an official source. Anything unverified is shown as “unconfirmed”, never estimated.

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