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Longines HydroConquest L3.740.3.98.7 | Blue Dial Like new & unworn Men's watch/Unisex Buy in Switzerland
In Stock
Original box, original papers

Longines HydroConquest L3.740.3.98.7

Reference
L3.740.3.98.7
Case diameter
41 mm
Dial
Blue
Case material
Steel
Condition
Like new & unworn
Bracelet color
Gold/Steel
USD 2,160 USD 2,250 -4%
Free insured shipping to · delivery November 2 – November 3
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14-day return · Warranty included · Insured shipping
Contact via WhatsApp Personal assistance with your purchase

Longines HydroConquest L3.740.3.98.7 Features

Reference number
L3.740.3.98.7
Brand
Longines
Gender
Men's watch/Unisex
Case material
Steel
Bracelet material
Steel
Scope of delivery
Original box, original papers
Year of production
Unknown
Dial
Blue
Clasp
Fold clasp
Crystal
Sapphire crystal
Bezel material
Steel
Clasp material
Steel
Movement
Quartz
Water resistance
30 ATM
Condition
Like new & unworn
Case diameter
41 mm
Availability
Item is in stock
Lug width
21 mm
Dial numerals
Lines
Model
HydroConquest
Collection
HydroConquest
Thickness
11.9 mm
Bracelet color
Gold/Steel
Caliber/movement
L157
Dealer product code
LO613

Longines HydroConquest L3.740.3.98.7 Description

On this Longines HydroConquest L3.740.3.98.7, the case is Steel, the dial is Blue and the bracelet is Steel. The case measures 41 mm across. The bezel is made of Steel.

The dial numerals are listed as "Lines". The dial is protected by Sapphire crystal. The watch is powered by the Quartz movement.

The bracelet comes in Gold/Steel. It is secured by the Fold clasp. The clasp is made of Steel. The watch dates from Unknown.

Condition and set

The reference number L3.740.3.98.7 separates this version from other variants of the model, down to dial, bezel and bracelet details, so match it against the photos before you buy.

Authenticity and service

Every watch sold by WATCHOYSTER is inspected and authenticated by our certified watchmaker and verified against The Watch Register before it reaches you. Each piece comes with our warranty and a 14-day return policy. Interested in the Longines HydroConquest L3.740.3.98.7? Write to us on WhatsApp, and we will send additional photos and delivery details.

Watch Certificate™

Watch Certificate™

For maximum security and transparency, a Watch Certificate™ can be provided upon request. This independent document confirms the authenticity of the timepiece and protects you from counterfeit or altered watches.

International Certification

International Certification

We cooperate with the global organization The Watch Register®. Upon request, every watch - whether new or pre-owned — can be supplied with an official certificate from this international authority.

Insured delivery

Insured delivery

All orders are shipped with full insurance, ensuring that both domestic and international shipments are safe and worry-free.

14-day return policy

14-day return policy

You may return the watch within 14 days if it differs from the description or photos, or if there is a defect not mentioned.

Inspected by Certified Watchmaker

Inspected by Certified Watchmaker

All our timepieces are thoroughly inspected by our certified watchmaker to ensure authenticity and perfect working condition. Every watch we offer is guaranteed to be 100% original.

Personal collection

Personal collection

When preferred, collect your watch from our private showroom in Geneva. A secure and discreet handover, designed for your comfort and peace of mind.

How Returns Work

Contact Us

1. Contact Us

Contact us Inform us about the return by writing via WhatsApp — it’s the fastest and easiest way.

Secure Return

2. Secure Return

Secure return We will provide you with an insured shipping label so you can safely return your watch.

Money Back

3. Money Back

Once your returned watch has been received and inspected, approved refunds are processed within 7–10 business days, using the original payment method whenever possible.

Longines HydroConquest L3.740.3.98.7
Security & Warranty
Authenticity
Flexible payment options
Insured shipping

Before You Buy Longines HydroConquest L3.740.3.98.7

Key details about authentication, financing, viewing, delivery, and condition.

Yes. Before shipment, our certified watchmaker thoroughly inspects this Longines HydroConquest (Ref. L3.740.3.98.7). The inspection covers movement accuracy, the integrity of its Steel case (41 mm), the condition of its Blue dial, and overall authenticity. The serial number is also checked against The Watch Register.

This timepiece comes with 24 months of WATCHOYSTER Official Brand Service Coverage, with eligible repairs carried out at authorised brand service centres at our expense. Our 14-day return policy also applies if the watch does not match its description or photographs.

Flexible financing is available for selected watches to eligible customers residing in Switzerland. Currently, financing is offered for watches priced up to CHF 10,000.

Eligible models are clearly marked with a financing badge on the product page.

Interest rates, repayment periods and approval conditions depend on the financing provider. Full details are presented during the application process at checkout.

WATCHOYSTER is a professional luxury watch dealer based in Geneva, Switzerland. Due to our secure storage and logistics arrangements, we do not offer in-person viewings before purchase.

However, we are happy to provide additional photographs, detailed videos, and personal assistance to help you make a confident decision.

Clients are welcome to collect their watches in person at our Geneva office by appointment after purchase.

This Longines HydroConquest L3.740.3.98.7 is carefully inspected and verified before shipment, then dispatched fully insured from our Geneva facility. Delivery typically takes 4–7 business days, depending on the watch and destination. Estimated delivery dates specific to this timepiece are clearly displayed on its product page. Tracking information is provided once the watch has been dispatched. Included with this timepiece: Original box, original papers.

This Longines HydroConquest is listed in Like new & unworn condition. Before shipment, our certified watchmaker carefully inspects the case, dial, bezel, crystal, and bracelet to verify its condition and ensure it matches the description. Real photographs on this page show the actual watch. Included with this timepiece: Original box, original papers. A WatchCertificate digital passport is available on request, providing independent documentation of the watch’s authenticity, condition, and available service history.

Customer Reviews

Real impressions from clients who worked with our team and received their watches.

  • 5.0
    Jonas N.
    CH · 25.04.2025
    Verified

    Perfect transaction. The Watch is nearly in NOS Condition. Thank you again.

    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0
  • 5.0
    Tomas
    SE · 06.04.2026
    Verified

    Fantastic seller, highly recommend buying. Easy communication throughout the whole purchase and watch in perfect condition. I will buy again.

    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0
  • 5.0
    Alexander P.
    US · 26.01.2025
    Verified

    Very quickly dispatched, well packaged, as described , highly recommended

    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0
  • 5.0
    Stephane A.
    CH · 04.05.2026
    Verified
    Average
    5.0
    Communication
    5.0
  • 5.0
    Thomas G.
    CH · 08.09.2025
    Verified

    100%—an excellent rating 👌

    Article
    5.0
    Average
    5.0
    Delivery
    5.0
  • 5.0
    Giancarlo L.
    CH · 02.09.2025
    Verified

    Everything ok, quick delivery - very nice watch! Gladly again at any time. Thank you

    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0
  • 5.0
    Attila D.
    HU · 03.01.2025
    Verified

    Quick response and maximum helpfulness.

    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0
  • 5.0
    Ophélie S.
    CH · 19.02.2025
    Verified

    Perfect and very responsive !

    Article
    5.0
    Average
    5.0
    Communication
    5.0
  • 5.0
    A.S.
    CH · 24.06.2025
    Verified

    Great experience thank you

    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0
  • 5.0
    Austin C.
    US · 31.01.2025
    Verified
    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0

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