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The Encyclopedia of Horology

Wristwatch · Chronograph wristwatch

Omega Speedmaster Professional Ref. 105.012 Chronograph Wristwatch

Partially verified

This 1967 Omega Speedmaster Professional reference 105.012 is a manual-wind chronograph wristwatch. The watch features a 42 mm stainless steel case with the characteristic asymmetrical design intended to protect the crown and pushers. The matte black dial is equipped with baton indices featuring luminescent material, an external minute and second track, and an outermost 1/5 second graduation. Sub-dials include a continuous seconds register at the 9 o'clock position, a 30-minute recorder at 3 o'clock, and a 12-hour counter at 6 o'clock. The time and chronograph functions are displayed via luminescent baton hands and a central sweep seconds chronograph hand with a pointed tip. The bezel carries a tachymeter scale. Internally, the watch is powered by the manual-wind caliber 321 movement. It is offered with an extract from the archives and is mounted on a leather strap.

Front view of the Omega Speedmaster Professional reference 105.012 showing the dial, tachymeter bezel, and leather strap.
Front view of the Omega Speedmaster Professional reference 105.012 showing the dial, tachymeter bezel, and leather strap. — Zamanito. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Wristwatch · Chronograph wristwatch
Maker / attribution
OMEGA
Reference
105.012
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
1967
Source-reported place
Not established

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

The watch features a stainless steel case measuring 42 mm in diameter. The design is noted for its asymmetrical configuration, which was introduced to provide protective guards for the crown and pushers. The case is fitted with a bezel engraved with a tachymeter scale, used for calculating speed and time intervals.

The dial is finished in matte black and displays luminous baton indices. It is organized with a central hour and minute display, supplemented by three sub-dials: a 30-minute counter at the 3 o'clock position, a 12-hour register at 6 o'clock, and a sub-seconds display at 9 o'clock. The dial periphery contains both minute and second divisions, with an outer track calibrated to 1/5 of a second. Hands are baton-style with luminescent inserts.

Evidence for this section
  • “بدنه نامتقارن شامل محافظ‌هایی برای جلوگیری از گیر کردن تاج کوک و دکمه‌های فشاری”
  • “قطر بدنه این ساعت ۴۲ میلی‌متر اعلام شده و زه آن مجهز به مقیاس تاچیمتر است”
  • “صفحه ساعت طبق منبع به رنگ مشکی مات با شاخص‌های باتوم رنگ‌آمیزی‌شده با ماده شب‌نما است”

Movement and Technical Features

The watch is operated by a manual-wind movement, specifically the Omega caliber 321. This movement powers the chronograph functions, allowing for the timing of events alongside standard timekeeping.

The chronograph system is operated via the crown and pushers, with a central sweep hand indicating chronograph seconds. The tachymeter bezel acts as a computational tool for measuring velocity based on time intervals, a standard functional component for this model reference.

Evidence for this section
  • “این ساعت طبق مشخصات منبع به موتور کوک دستی با کالیبر 321 مجهز است”
  • “عملکردهای آن شامل کرونوگراف و زه تاچیمتر جهت سنجش سرعت و فواصل زمانی تعریف شده است”

Documentation and Provenance

The watch is documented as having been manufactured in 1967. The listing includes an extract from the archives, which serves as official documentation from the manufacturer regarding the production year and model details.

The provided information indicates that the piece is paired with a leather strap. The object is presented as part of the Speedmaster Professional series, identified by the reference number 105.012.

Evidence for this section
  • “سند استخراج از آرشیو (Extract from the Archives) به همراه این قطعه ثبت شده است”
  • “ساعت مچی کرونوگراف مدل OMEGA Speedmaster با رفرنس 105.012 در سال ۱۹۶۷ ساخته شده است”

Open research questions

  • What is the specific movement serial number associated with this piece?
  • Does the extract from the archives confirm the original retail destination of this watch?

Source evidence

Recorded claims and source quotations for Omega Speedmaster Professional Ref. 105.012 Chronograph Wristwatch
FieldSource-reported valueSource quotation
Reference105.012“105.012”
Year of Manufacture1967“ساخت ۱۹۶۷”
Case MaterialStainless steel“فولاد ضدزنگ (Stainless steel)”
Case Diameter42 mm“۴۲ میلی‌متر”
MovementCaliber 321, manual-wind“موتور کوک دستی با کالیبر 321”
AccessoriesExtract from the archives“سند استخراج از آرشیو (Extract from the Archives)”

Visible details

  • Asymmetrical case design protecting the crown and pushers
  • Tachymeter bezel with 500-unit scale
  • Matte black dial with three sub-registers
  • Luminescent baton hands and indices

Research qualifications

  • The specific serial number is not provided in the source text
  • The exact provenance beyond the archive extract is not specified

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

Consulted source

Stainless steel OMEGA ref. 105.012 Speedmaster Professional chronograph wristwatch. Made 1967

Reviewed 2026-11-02 · Record b5262e2595

Terms in this record

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

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