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Zenith Defy 03.A3642.670/3690.M3642 | Blue Dial Like new & unworn Men's watch/Unisex Buy in Switzerland
In Stock
Original box, original papers

Zenith Defy 03.A3642.670/3690.M3642

Reference
03.A3642.670/3690.M3642
Case diameter
37 mm
Dial
Blue
Case material
Steel
Condition
Like new & unworn
Bracelet color
Steel
USD 6,780 USD 7,070 -4%
Free insured shipping to · delivery October 27 – October 28
Visa Mastercard Apple Pay Google Pay Bank transfer
14-day return · Warranty included · Insured shipping
Contact via WhatsApp Personal assistance with your purchase

Zenith Defy 03.A3642.670/3690.M3642 Features

Reference number
03.A3642.670/3690.M3642
Brand
Zenith
Gender
Men's watch/Unisex
Movement
Automatic
Case material
Steel
Bracelet material
Steel
Scope of delivery
Original box, original papers
Dial
Blue
Clasp
Fold clasp
Crystal
Sapphire crystal
Bezel material
Steel
Bracelet color
Steel
Clasp material
Steel
Water resistance
30 ATM
Condition
Like new & unworn
Case diameter
37 mm
Power reserve
50 h
Model
Defy
Collection
Defy
Availability
Item is in stock
Year of production
2025
Dial numerals
Lines
Caliber/movement
Elite 670
Dealer product code
ZE841

Zenith Defy 03.A3642.670/3690.M3642 Description

Zenith Defy 03.A3642.670/3690.M3642 is a watch, inspected by our certified watchmaker in Geneva and offered by WATCHOYSTER. It ships worldwide, fully insured. The photos show the actual watch, and the sections below cover what matters when you choose between examples of this reference.

Condition and set

Any wear is visible in the photos, and we describe it as plainly as we can. Like new & unworn is the grade we assign after inspecting the case, dial, bezel, crystal, and bracelet, and the photos show the wear behind that grade. The set is described as "Original box, original papers". Box and papers document provenance, and a watch with a full set is usually easier to resell.

The reference number 03.A3642.670/3690.M3642 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 Zenith Defy 03.A3642.670/3690.M3642? 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

Money back As soon as we receive the watch, you will get a bank transfer refund without delay.

Zenith Defy 03.A3642.670/3690.M3642
Security & Warranty
Authenticity
Flexible payment options
Insured shipping

Before You Buy Zenith Defy 03.A3642.670/3690.M3642

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

Yes. This Zenith Defy 03.A3642.670/3690.M3642 has been physically inspected in-house by our certified watchmaker, covering movement accuracy, case integrity of the 37 mm Steel case, Blue dial condition, and overall authenticity. Every serial number is verified against The Watch Register before listing. This piece carries our 12-month warranty and is covered by our 14-day return policy if it does not correspond to its description.

Financing is available only for selected watches priced up to CHF 10,000. Eligible models are clearly marked with a financing badge on the product page.

If a watch does not display the financing badge, or its price exceeds CHF 10,000, interest-free financing is not available for that model.

For eligible watches, financing is available to clients residing in Switzerland, with terms from 3 to 24 months. Approval is typically completed within a few minutes during checkout by the HeyLight partner bank.

As we are based in the secure Geneva Free Zone, we generally do not offer pre-purchase viewings and operate primarily as an online retailer due to security and insurance requirements.

A limited number of watches are available for in-person inspection by appointment at our office. Availability depends on the specific model. Some watches can be viewed before purchase, while others are available for collection only after payment.

Please contact us via WhatsApp with the watch details, and we will confirm whether the model is available for viewing or collection only.

This Zenith Defy 03.A3642.670/3690.M3642 ships fully insured from our Geneva facility. Standard delivery across Switzerland takes 4 to 5 business days. International shipments to 50+ countries typically arrive within 7 business days. You receive tracking information at the point of dispatch. Original box, original papers is included with this piece.

This Zenith Defy is listed in Like new & unworn condition, assessed across case, dial, bezel, crystal, and bracelet by our in-house certified watchmaker before listing. Real photographs on this page reflect the actual state of the watch. Original box, original papers is included. A Watch Certificate digital passport is available on request for independent verification of the watch's details and service history.

Customer Reviews

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

  • 5.0
    Francisco M.
    ES · 24.03.2025
    Verified
    Average
    5.0
    Communication
    5.0
  • 5.0
    Charles K.
    US · 30.03.2026
    Verified

    Very pleasant to work with, I will buy from again.

    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0
  • 5.0
    Carlos V.
    US · 31.07.2025
    Verified

    Excellent dealer, all documentation was correct and watch was impeccable!

    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0
  • 5.0
    Philipp W.
    CH · 09.12.2025
    Verified
    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0
  • 5.0
    Nicola G.
    CH · 07.09.2024
    Verified
    Average
    5.0
    Communication
    5.0
  • 5.0
    TM
    BE · 19.01.2026
    Verified

    Smooth transaction and a very professional dealer. Fast communication, very responsive, and the watch arrived very well-packaged and as advertised. I will gladly buy more watches in future from them.

    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0
  • 5.0
    Charles D.
    NL · 29.09.2025
    Verified

    Great service, very happy with the purchase

    Article
    5.0
    Average
    5.0
    Communication
    5.0
  • 5.0
    Ruslan S.
    US · 24.09.2024
    Verified
    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0
  • 5.0
    L
    SE · 14.07.2025
    Verified
    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0
  • 5.0
    Martin F.
    CH · 19.01.2026
    Verified

    The purchase was completed without difficulty within a short time. The excellent documentation of the watch through photos and a video matched its actual condition and was also decisive in my willingness to pay a slightly higher price! I am completely satisfied!

    Article
    5.0
    Average
    5.0
    Delivery
    5.0
    Communication
    5.0

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