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The Encyclopedia of Horology

Wristwatch · Chronograph wristwatch

Omega Speedmaster Professional Chronograph ref. 145.012

Partially verified

This vintage Omega Speedmaster Professional chronograph, reference 145.012, dates to 1968. It features a 42mm stainless steel case paired with a brown leather strap. The matte black dial displays luminous linear indices and an outer track with one-fifth-second divisions. The dial configuration includes three subsidiary registers: a small seconds sub-dial at the 9 o'clock position, a 30-minute counter at 3 o'clock, and a 12-hour counter at 6 o'clock. The time is indicated by luminous linear hands, while the central chronograph hand is arrowhead-tipped. Power is provided by the manually-wound Caliber 321, developed based on Lemania mechanisms. The source notes that the 145.012 reference was introduced in 1967 and represents the final generation of the Speedmaster series to utilize the Caliber 321. The watch includes an external tachymeter bezel.

Front view of the Omega Speedmaster Professional, highlighting the matte black dial and the tachymeter bezel.
Front view of the Omega Speedmaster Professional, highlighting the matte black dial and the tachymeter bezel. — Zamanito. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Wristwatch · Chronograph wristwatch
Maker / attribution
Omega
Reference
145.012
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
1968
Source-reported place
Switzerland

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 is housed in a 42mm stainless steel case. The bezel, positioned around the dial, features a tachymeter scale. The dial is finished in matte black and is configured with luminous linear hour indices. Exterior minute and second track markings are present, along with a scale for one-fifth-second intervals.

The dial layout utilizes three sub-registers. The small seconds indicator is located at the 9 o'clock position, a 30-minute recorder at the 3 o'clock position, and a 12-hour register at the 6 o'clock position. The primary time-telling hands are linear and luminous, complemented by a central chronograph hand with an arrowhead design.

Evidence for this section
  • “قاب این ساعت دارای قطر ۴۲ میلی‌متر است و در اطراف صفحه، بزل مجهز به مقیاس تاچی‌متر (Tachymètre) قرار دارد.”
  • “صفحه ساعت به رنگ مشکی مات طراحی شده و شاخص‌های خطی شب‌نما، تقسیمات بیرونی ثانیه و دقیقه، و تقسیمات خارجی یک‌پنجم ثانیه بر روی آن دیده می‌شوند.”
  • “عقربه‌های اصلی به شکل خطی شب‌نما بوده و عقربه مرکزی کرنوگراف دارای سری پیکانی (arrowhead) است.”

Movement and Functionality

The timepiece operates on the manual-winding Caliber 321. This movement was developed through the utilization of Lemania mechanisms. The reference 145.012, introduced in 1967, is identified as the final iteration within the Speedmaster line to incorporate this specific caliber.

The watch includes a chronograph function with three specific counters. The system is manually wound and the watch is fitted with a brown leather strap.

Evidence for this section
  • “نیروی محرکه این ساعت توسط کالیبر دستی 321 تأمین می‌شود که بر پایه مکانیزم‌های لمانیا (Lemania) توسعه یافته است.”
  • “رفرنس 145.012 که در سال ۱۹۶۷ معرفی شد، آخرین رفرنس از سری اسپیدمستر بود که از کالیبر افسانه‌ای 321 استفاده می‌کرد”
  • “همراه با یک بند چرمی قهوه‌ای‌رنگ ارائه شده است.”

Documentation and Condition

Technical information regarding the current operational status, maintenance history, or included accessories is not explicitly provided by the source. The condition of the watch components is intended to be evaluated by the viewer based on the provided photographs.

The information provided in this record is derived from data supplied by the seller. The catalogue documentation does not constitute an independent authentication or evaluation of the watch's condition or originality.

Evidence for this section
  • “وضعیت فنی دقیق، سوابق سرویس و لوازم جانبی ساعت در اطلاعات فروشنده به صورت مشخص اعلام نشده و وضعیت قطعات بر اساس تصاویر موجود قابل مشاهده است.”
  • “اطلاعات و مشخصات ارائه‌شده در این شناسنامه مستقیماً از داده‌های فروشنده استخراج شده و بازتاب‌دهنده ارزیابی یا تأیید اصالت مستقل توسط زمانیتو نمی‌باشد.”

Open research questions

  • What is the specific movement serial number to verify the production window within 1968?
  • What is the case serial number to determine the specific production batch for reference 145.012?

Source evidence

Recorded claims and source quotations for Omega Speedmaster Professional Chronograph ref. 145.012
FieldSource-reported valueSource quotation
BrandOMEGA“برند امگا (OMEGA)”
ModelSpeedmaster Professional“سری نامدار Speedmaster Professional”
Reference145.012“رفرنس 145.012”
Date1968“سال ۱۹۶۸ تولید شده است”
Case diameter42 mm“قطر ۴۲ میلی‌متر”
FunctionManual-wind chronograph“سیستم کوک دستی”

Visible details

  • Matte black dial with 'T SWISS MADE T' marking at the bottom
  • Arrowhead-tipped central chronograph hand
  • External tachymeter bezel with visible surface wear
  • Three-register layout with counters at 3, 6, and 9 o'clock

Research qualifications

  • Specific technical condition and service history are not confirmed by the seller
  • Authenticity of individual components has not been independently verified by the site

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

Consulted source

ساعت مچی کرنوگراف OMEGA Speedmaster Professional رفرنس 145.012 ساخت ۱۹۶۸ (نمونه ۱)

Reviewed 2026-11-02 · Record f24cbfa915

Terms in this record

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

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