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The Encyclopedia of Horology

Wristwatch · Chronograph

Omega Speedmaster Professional 145.022-78 ST

Partially verified

This Omega Speedmaster Professional is a chronograph wristwatch, model 145.022-78 ST, dating to circa 1979. It is powered by the Lemania-based 861 movement. The stainless steel case has a diameter of 42 mm excluding the crown. The dial features three subsidiary registers and is marked "T SWISS MADE T" at the bottom. The watch is accompanied by an original 633/1171 bracelet with full links. The auction description reports the watch is in excellent condition, noting normal wear marks on the bezel and an emerging patina on the dial markers and hands. All chronograph and timekeeping functions are reported to be operational. , and the provided serial number is 391xxxx.

Front-facing view of the Omega Speedmaster Professional 145.022-78 ST showing the dial, markers, and tachymeter bezel.
Front-facing view of the Omega Speedmaster Professional 145.022-78 ST showing the dial, markers, and tachymeter bezel. — Ashton-Blakey Vintage Watches. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
ashton-blakey-antiques.com
Category
Wristwatch · Chronograph
Maker / attribution
Omega
Reference
145.022-78 ST
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
circa 1979
Source-reported place
Not established
Source-reported serial
391xxxx

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

Dial and Case Construction

The watch is housed in a stainless steel case measuring 42 mm in diameter, excluding the crown. It features a fixed black bezel with an etched tachymeter scale, which exhibits minor normal signs of wear. The dial is black with three subsidiary registers for elapsed time tracking. The hour indices and the hands display signs of age-related patina.

The dial is marked with the Omega logo and the name 'Speedmaster Professional'. At the bottom of the dial, the text 'T SWISS MADE T' is visible, indicating the use of tritium luminous material for the markers. The watch is fitted with a crystal, and the stainless steel case transitions into a linked bracelet.

Evidence for this section
  • “42 mm diameter excluding crown”
  • “minimal normal/infrequent wear marks on the bezel”
  • “fabulous patina emerging on the markers and hands”

Movement and Functionality

The timepiece is powered by the 861 movement, which the source identifies as a Lemania construction. This movement type represents the generation introduced after the earlier variants used in the initial moon-landing-era Speedmasters.

The auction description reports that the movement is clean and that all chronograph and timekeeping functions operate as intended. The manual-wind chronograph mechanism is controlled via the crown and pushers located on the side of the case.

Evidence for this section
  • “861 Lemania Movement”
  • “All watch and chronograph functions are perfect and crisp with a clean movement.”

Bracelet and Provenance

The watch is presented with its original Omega bracelet, specifically identified as the 633/1171 reference. The source notes that the bracelet includes full links, making it suitable for larger wrist sizes. The bracelet is constructed of stainless steel links to match the watch case.

The source classifies this specific reference as part of the post-moon landing era of Speedmaster models.

Evidence for this section
  • “Watch has its original 633/1171 bracelet with full links”
  • “This is the first generation of the post moon landing Speedmaster”

Open research questions

  • Does the 391xxxx serial number sequence confirm a 1979 manufacture date?
  • Is the 633/1171 bracelet original to this specific 145.022-78 reference?

Source evidence

Recorded claims and source quotations for Omega Speedmaster Professional 145.022-78 ST
FieldSource-reported valueSource quotation
MakerOmega“1979 Omega Speedmaster 145.022 ST 78.”
MovementLemania 861“861 Lemania Movement”
Serial Number391xxxx“Serial number 391xxxx”
Bracelet633/1171“Watch has its original 633/1171 bracelet”
Diameter42 mm“42 mm diameter excluding crown”
Datecirca 1979“Circa 1979”

Visible details

  • Black tachymeter bezel with visible wear marks
  • Patina visible on the hour markers and hands
  • Three-register chronograph layout
  • Stainless steel linked bracelet with 633 end links

Research qualifications

  • The exact production year relies on the provided serial number range
  • The extent of the patina's uniformity is not fully detailed in the provided data

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

Consulted source

ساعت مچی امگا Speedmaster Professional 145.022-78 ST

Reviewed 2026-11-02 · Record 2c4921809f

Terms in this record

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

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