Longines HydroConquest - 39mm - Black
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Product Information
Full details
The Longines HydroConquest 39mm is an ideal timepiece for individuals seeking a sophisticated yet robust watch that transitions seamlessly from underwater adventures to professional environments. With its 300-meter water resistance and sleek black lacquered aesthetic, it offers exceptional reliability and a classic dive-watch silhouette; however, prospective buyers should note that its mechanical self-winding nature requires regular wear or a watch winder to maintain timekeeping accuracy if left stationary for extended periods.
All features
| Colour | Black |
|---|---|
| Dial Size | 39mm |
| Series | HydroConquest |
| Model Part Number | L37794566 |
| Brand | Longines |
Extended Product Information
FAQs
Is the HydroConquest suitable for scuba diving?
Yes, with a water resistance rating of 300 meters and a unidirectional rotating bezel, it meets the requirements for a professional-grade diver's watch.
What is the benefit of the silicon balance spring?
The silicon balance spring makes the movement highly resistant to magnetic fields and temperature fluctuations, leading to better long-term precision.
Does this model come with a rubber strap or metal bracelet?
The L37794566 is typically presented on a stainless steel bracelet, though Longines offers interchangeable strap options through authorized service centers.
How often should I service the movement?
It is recommended to have the movement checked by an authorized Longines technician every 3 to 5 years to ensure optimal performance.
Can I replace the bezel insert if it scratches?
The ceramic bezel is highly scratch-resistant; however, any necessary repairs or replacements should be performed by an official service center.
Troubleshooting
The watch stopped running.
The power reserve may have depleted. Manually wind the crown clockwise 20-30 times and ensure the watch is worn daily or placed on a mechanical watch winder.
The date is incorrect.
Pull the crown to the first click position and rotate to advance the date. Note: Avoid changing the date between 9:00 PM and 3:00 AM to prevent damage to the gear train.
Pros and Cons
Pros
- High-performance movement with 72-hour power reserve
- Excellent water resistance suitable for professional diving
- Scratch-resistant ceramic bezel insert
- High legibility in all lighting conditions
- Magnetic resistance via silicon balance spring
Cons
- Mechanical movement requires maintenance compared to quartz
- Date window position may be less visible at certain angles
- Does not feature an internal GMT function
- 39mm sizing may feel small for those preferring oversized watches
Setup, Compatibility & Care
To start the watch, unscrew the crown by turning it counter-clockwise until it pops out to the manual winding position. Wind the crown clockwise approximately 20-30 times to fully tension the mainspring. Pull the crown to the next position to set the date, and to the final position to adjust the time. Always ensure the crown is fully screwed back in before water exposure to maintain its water-resistant seal. Clean the watch periodically using a soft cloth and fresh water, especially after exposure to saltwater, to remove any debris or salt buildup.