Photo: Tempus Shop
Catalogue / Longines / ref. L3.769.3.98.7
Longines HydroConquest - L3.769.3.98.7
The Longines HydroConquest is a quartz watch, 42 mm across, with a sapphire crystal, water-resistant to 300 m. It was listed at €1,750 at Tempus at our check on 12 November 2026. It costs 13% more than the median of the 179 quartz Longines watches in the catalogue (€1,550).
Where to buyChecked 12 November 2026
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Who it suits
Anyone who swims, dives or wants a watch that never needs babying.
Strengths
Sapphire crystal · Water-resistant to 300 m
Limits
Quartz movement
Our view
A good choice at this price
Of 148 quartz watches within 20% of its price, none is better equipped (crystal, water resistance, titanium).
Depending on what you want
- If your wrist is slim, the Longines HydroConquest measures only 30 mm, at €1,450.
- If you would rather have an automatic movement at the same price, the Auricoste Spirotechnique has one, at €1,750.
- If you want to spend less without losing anything on the spec sheet, the Longines Conquest 43mm Argenté costs €1,000.
- If you like the model but not this version, see the Longines HydroConquest, at €1,750.
Reading the spec sheet
What the spec sheet says
- Sapphire crystal. The most scratch-resistant option.
- Water-resistant to 300 m. Swimming and diving without a second thought.
- Quartz movement. At €1,750, other watches in the catalogue have an automatic movement.
Analysis based on the retailer’s spec sheet, without handling the watch.
- Brand
- Longines
- Strap material
- Red-gold PVD steel
- Diameter
- 42 mm
- Crystal
- Sapphire crystal
- Movement
- Quartz
- Water resistance
- 300 m (30 bar)
- Dial colour
- Sandblasted blue
- Clasp
- Double-safety folding clasp
- Reference
- L3.769.3.98.7
Questions
The short answers
Is the Longines HydroConquest an automatic watch?
No. It runs on a quartz movement.
Can you swim with the Longines HydroConquest?
Yes. It is water-resistant to 300 m, which covers swimming and diving.
Does the crystal of the Longines HydroConquest scratch?
It has a sapphire crystal, the most scratch-resistant kind.
What size is the Longines HydroConquest?
Its case measures 42 mm in diameter.
How much does the Longines HydroConquest cost?
It was listed at €1,750 at Tempus at our check on 12 November 2026.
Where it ranks
This watch appears in
- Quartz watches with sapphire crystal, water-resistant to 100 m96 references
- Quartz watches with sapphire crystal under €2,000257 references
- Watches with sapphire crystal, water-resistant to 100 m, under €2,000365 references
- Quartz dive watches44 references
- Quartz watches, water-resistant to 100 m116 references
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