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The Encyclopedia of Horology

Wristwatch · World time wristwatch

Zenith World Time reference A3634

Partially verified

The Zenith World Time reference A3634 is an automatic wristwatch manufactured in Switzerland, designed to display international time zones. The watch features a 37mm metal case and a bi-directional rotating blue bezel inscribed with the names of major global cities. Its dial is finished with a blue sunburst pattern and includes applied indexes filled with tritium luminous material. Matching hands also feature tritium application. A date aperture is located between the four and five o'clock positions. The watch is presented on a black rubber Tropic-style strap. While the source notes that the case back is adorned with the Zenith star logo, specific details regarding the internal movement and caliber are not provided. This model belongs to the brand's historic catalogue, serving as a travel-oriented timepiece with a distinct aesthetic.

Frontal view of the Zenith World Time reference A3634 on a rubber strap.
Frontal view of the Zenith World Time reference A3634 on a rubber strap. — Zamanito. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Wristwatch · World time wristwatch
Maker / attribution
Zenith
Reference
A3634
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
Not established
Source-reported place
سوئیس

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Case and Bezel

The watch is housed in a 37mm metallic case. The exterior features a prominent bi-directional rotating bezel designed for world time functionality. This bezel is finished in a blue color and is inscribed with the names of various international cities to facilitate the tracking of global time zones.

The case back is engraved with the Zenith star logo. The watch is fitted with a black Tropic-style rubber strap, which complements the overall aesthetic of the piece.

The construction is described as being built upon a classic case design intended for traveler use, balancing both sporty elements and practical functionality.

Evidence for this section
  • “ساختار کلی ساعت بر پایه یک قاب با طراحی کلاسیک بنا شده”
  • “بزل چرخان دوجهته با درج نام شهرهای مهم جهان به رنگ آبی تعبیه شده”
  • “قطر قاب فلزی این مدل ۳۷ میلی‌متر”
  • “درب پشتی مزین به لوگوی ستاره زنیت دیده می‌شود”

Dial and Hands

The dial is characterized by a blue sunburst finish, which provides a shifting appearance under varying light conditions. The indices are applied and contain tritium-based luminous material, which has aged to a consistent color.

The handset follows the design language of the markers, also being finished with a tritium coating. A date window is positioned between the four and five o'clock indicators, with the word 'automatic' printed on the dial surface.

Evidence for this section
  • “صفحه ساعت دارای پرداخت آبی‌رنگ با الگوی پرتو خورشیدی (sunburst) است”
  • “ایندکس‌های ساعت با ماده شب‌نما از نوع تریتیوم پر شده‌اند”
  • “مجموعه‌عقربه‌ها نیز از نظر طراحی و پوشش تریتیوم با نشانگرها هماهنگی کامل دارند”
  • “پنجره نمایش تاریخ نیز در موقعیت بین ساعت چهار و پنج تعبیه شده است”

Technical Condition

The watch is presented in vintage condition. While the external elements such as the dial, hands, and bezel are described, there is no information provided regarding the internal movement or its specific caliber.

The source provides no information regarding the service history of the watch, its current timekeeping accuracy, or whether the case has undergone any polishing. These details remain unconfirmed by the provided documentation.

Evidence for this section
  • “مشخصات دقیق موتور و کالیبر در متن منبع ذکر نشده است”
  • “ساعت در وضعیت وینتیج با صفحه آبی آفتابی، عقربه‌ها و ایندکس‌های هماهنگ تریتیوم ارائه شده است”
  • “جزئیات دقیق‌تری در خصوص تاریخچه سرویس، میزان دقت کارکرد یا سابقه پولیش در متن فروشنده تصریح نشده است”

Open research questions

  • What specific movement caliber is used in the reference A3634?
  • What are the production years for the Zenith A3634 reference?

Source evidence

Recorded claims and source quotations for Zenith World Time reference A3634
FieldSource-reported valueSource quotation
MakerZenith“شرکت سوئیسی Zenith”
ReferenceA3634“رفرنس A3634”
Case Diameter37mm“قطر قاب فلزی این مدل ۳۷ میلی‌متر”
Movement TypeAutomatic“خودکار بودن ساعت قید شده”
BezelBi-directional world time“بزل چرخان دوجهته با درج نام شهرهای مهم جهان”
Country of manufactureSwitzerland“شرکت سوئیسی Zenith”
Luminous MaterialTritium“ایندکس‌های ساعت با ماده شب‌نما از نوع تریتیوم پر شده‌اند”
StrapTropic-style rubber“بند لاستیکی مدل ترپیک (Tropic)”

Visible details

  • Blue sunburst dial finish
  • Bi-directional bezel with world city names
  • Tritium-filled markers and hands
  • Date window between four and five o'clock positions

Research qualifications

  • No details on internal movement or caliber
  • No information regarding service history or polishing

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

ساعت مچی وینتیج Zenith World Time رفرنس A3634

Reviewed 2026-11-02 · Record b472bb533c

Terms in this record

Glossary explanations for terms named in this object’s record.

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