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The Encyclopedia of Horology

Wristwatch · Diver's wristwatch

OMEGA Seamaster Professional Diver 300M, Ref. 2531.80.00

Partially verified

This OMEGA Seamaster Professional Diver 300M is a stainless steel wristwatch, catalogued as dating to 2005. The case measures 42mm in diameter and is fitted with a unidirectional rotating bezel featuring a blue insert and a 60-minute diving scale. A helium escape valve is integrated into the case side at the 10 o'clock position. The blue dial is decorated with an embossed wave pattern and contains luminous hour markers, skeletonized hands, a central seconds hand, and a date window at the 3 o'clock position. The watch is powered by an automatic Calibre 1120 movement, which is certified as a chronometer. It is presented on a stainless steel bracelet that includes an integrated diver's extension system. The object is accompanied by its original box and pictogram cards as reported in the provided documentation.

Front view of the Omega Seamaster Professional Diver 300M with blue dial and bezel.
Front view of the Omega Seamaster Professional Diver 300M with blue dial and bezel. — Zamanito. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Wristwatch · Diver's wristwatch
Maker / attribution
OMEGA
Reference
2531.80.00
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
2005
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 Dial Construction

The timepiece features a 42mm stainless steel case designed for professional diving, capable of withstanding pressures equivalent to 300 meters depth. The case incorporates a unidirectional rotating bezel with a blue insert marked with a 60-minute scale for elapsed time tracking. A distinct helium escape valve is positioned on the left side of the case at the 10 o'clock mark.

The dial is finished in blue and characterized by an embossed wave pattern. It features luminous-filled hour indices, a peripheral minute track, and skeletonized hour and minute hands. A date aperture is located at the 3 o'clock position. The overall design language is consistent with the professional diver specifications established for the Seamaster series.

Evidence for this section
  • “بدنه ساعت از جنس استنلس استیل با قطر ۴۲ میلی‌متر ساخته شده و به یک زهوار (بزل) چرخان یک‌طرفه با اینسرت آبی‌رنگ و مقیاس ۶۰ دقیقه‌ای غواصی مجهز است.”
  • “بر روی لبه بدنه در موقعیت ساعت ۱۰، شیر تخلیه گاز هلیوم (Helium Escape Valve) تعبیه شده است.”
  • “صفحه ساعت دارای الگوی کلاسیک امواج آبی (Blue wave dial)، نشانگرهای شب‌نما، شیار دقیقه‌ای بیرونی، عقربه‌های اسکلتی و عقربه ثانیه‌شمار مرکزی به همراه پنجره نمایش تاریخ در موقعیت ساعت ۳ است.”

Movement and Technical Specifications

The watch is driven by the Omega Calibre 1120, an automatic mechanical movement. This calibre functions as a chronometer, indicating that it meets specific precision requirements for timekeeping. The movement powers the central hours, minutes, and seconds functions, as well as the quick-set date display.

The construction of the watch reflects its intended use in underwater environments. The bracelet is constructed from stainless steel and features an integrated diver's extension, allowing the watch to be worn over diving suits.

Evidence for this section
  • “نیروی محرکه این ساعت توسط کالیبر اتوماتیک ۱۱20 امگا تأمین می‌شود که یک موتور کرنوتر با استاندارد سنجش زمانی دقیق است.”
  • “دستبند ساعت نیز از جنس استنلس استیل بوده و به سیستم افزایش طول مخصوص لباس غواصی (Divers extension) مجهز می‌باشد.”

Documentation and Reported Condition

The watch is offered with its original presentation box and accompanying pictogram cards, which provide identifying data for the reference. There is no historical information regarding previous maintenance or internal servicing of the movement.

According to the documentation provided, the exterior components do not show structural defects. The platform notes that this assessment is based entirely on the supplied source material and does not constitute an independent verification of authenticity or mechanical condition.

Evidence for this section
  • “طبق مستندات فروشنده، ساعت همراه با جعبه اصلی و کارت‌های پیکتوگرام ارائه می‌گردد و قطعات ظاهری آن بدون گزارش ایراد ساختاری خاصی در متن معرفی شده‌اند.”
  • “اطلاعاتی در مورد سوابق دقیق سرویس‌های قبلی در منبع ذکر نشده است”

Open research questions

  • Does the serial number on the lug provide a more specific production month in 2005?
  • Are there visible signs of refurbishment or polishing on the case finish?

Source evidence

Recorded claims and source quotations for OMEGA Seamaster Professional Diver 300M, Ref. 2531.80.00
FieldSource-reported valueSource quotation
MakerOMEGA“برند: OMEGA”
Reference2531.80.00“شماره رفرنس: 2531.80.00”
Year of manufacture2005“سال ساخت: ۲۰۰۵”
Case materialStainless steel“جنس قاب: استنلس استیل”
Movement calibre1120“کالیبر: 1120”
Water resistance300 meters“مقاومت در برابر آب: ۳۰۰ متر / ۱۰۰۰ فوت”

Visible details

  • Blue wave-pattern dial with luminous markers
  • Helium escape valve at 10 o'clock position
  • Stainless steel link bracelet with diver's extension
  • Unidirectional rotating bezel with blue insert

Research qualifications

  • Service history is not documented in the source
  • Authenticity and functionality are not independently verified by the platform

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

Consulted source

ساعت مچی غواصی OMEGA Seamaster Professional Diver 300M رفرنس 2531.80.00

Reviewed 2026-11-02 · Record e35a60d90d

Terms in this record

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

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