Photo: Tempus Shop
Catalogue / Longines / ref. L3.369.4.09.6
Longines HydroConquest - L3.369.4.09.6
The Longines HydroConquest is a quartz watch, 30 mm across, with a sapphire crystal, water-resistant to 300 m. It was listed at €1,450 at Tempus at our check on 12 November 2026. Its price is in line with the 179 quartz Longines watches in the catalogue (median: €1,550).
Where to buyChecked 12 November 2026
The button leads to today’s price. Affiliate link: the retailer pays us a commission, at no extra cost to you.
Who it suits
Anyone who swims, dives or wants a watch that never needs babying.
Strengths
Sapphire crystal · Water-resistant to 300 m · 30 mm diameter
Limits
Quartz movement
Our view
A good choice at this price
Of 114 quartz watches within 20% of its price, none is better equipped (crystal, water resistance, titanium).
Depending on what you want
- If you prefer a case with more presence, the Longines HydroConquest measures 42 mm, at €1,550.
- If you would rather have an automatic movement at the same price, the Mido Ocean Star 200C Titanium has one, at €1,350.
- 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 €1,450.
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.
- 30 mm diameter. A small, discreet case that suits slim wrists.
- Quartz movement. At €1,450, other watches in the catalogue have an automatic movement.
Analysis based on the retailer’s spec sheet, without handling the watch.
- Brand
- Longines
- Case material
- Steel
- Strap material
- Steel
- Diameter
- 30 mm
- Crystal
- Sapphire crystal
- Movement
- Quartz
- Water resistance
- 300 m (30 bar)
- Dial colour
- Sunray green
- Clasp
- Double-safety folding clasp
- Case back
- Screw-down case back
- Reference
- L3.369.4.09.6
At this price
Alternatives from other brands
Same type of movement, within 20% of the price.
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 30 mm in diameter.
How much does the Longines HydroConquest cost?
It was listed at €1,450 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 m, under €1,50079 references
- Quartz dive watches under €1,50037 references
- Quartz watches, water-resistant to 100 m, under €1,50099 references
- Quartz watches, 38 mm or smaller, under €1,500137 references
- Quartz watches with sapphire crystal under €1,500165 references
Official brand video
The collection on video
Same brand
