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The Encyclopedia of Horology

Wristwatch · Chronograph wristwatch

Omega Speedmaster Professional Ref. 145/345.0808

Partially verified

This Omega Speedmaster Professional is a stainless steel chronograph wristwatch, identified by reference number 145/345.0808, and attributed to the late 1990s. The watch features a black dial with painted luminous baton hour markers, an outer minute track, and white sword-style hands. The chronograph display includes a 30-minute counter at the 3 o'clock position, a 12-hour counter at the 6 o'clock position, and a small seconds register at 9 o'clock. The stainless steel case measures 40 mm in diameter and includes a tachymeter bezel and an open display screw-down caseback engraved with the inscription "Speedmaster Professional". The watch is powered by an Omega calibre 1861 manual-winding movement. The assembly is secured to the wrist by a stainless steel bracelet, identified by reference 1998/849. The dial, case, and movement bear Omega signatures, with the case and movement sharing the identification number 77077839.

Front view of the Omega Speedmaster Professional wristwatch showing the black dial, tachymeter bezel, and stainless steel bracelet.
Front view of the Omega Speedmaster Professional wristwatch showing the black dial, tachymeter bezel, and stainless steel bracelet. — Auction house “Adam's”, via Invaluable. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
orbiscollectibles.com
Category
Wristwatch · Chronograph wristwatch
Maker / attribution
Omega
Reference
145/345.0808
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
Circa late 1990s
Source-reported place
Switzerland
Source-reported serial
77077839

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 Bracelet

The watch is constructed with a stainless steel case measuring 40 mm in diameter. The design features a tachymeter bezel fixed to the case. A notable component of the housing is the open display screw-down caseback, which provides visibility into the movement mechanism. This caseback bears the engraved inscription "Speedmaster Professional".

The timepiece is attached to a stainless steel bracelet, which is designated by the reference number 1998/849. The total length of this bracelet is approximately 170 mm. The overall weight of the watch, including the case and the attached bracelet, is approximately 135 grams.

Evidence for this section
  • “The 40 mm stainless steel case is fitted with a tachymeter bezel and an open display screw-down caseback engraved with "Speedmaster Professional".”
  • “The timepiece is presented on an Omega stainless steel bracelet, reference 1998/849, measuring approximately 170 mm in length.”
  • “The total weight of the watch is approximately 135 grams.”

Dial and Chronograph Functions

The watch is equipped with a black dial featuring painted luminous baton markers to indicate the hours. The dial layout includes an outer minute track and white sword-style hands for reading the time. A central chronograph seconds hand is included for timing functions.

The chronograph capability is provided by three recessed subdials. These consist of a 30-minute counter positioned at 3 o'clock, a 12-hour counter at 6 o'clock, and a small seconds register located at 9 o'clock. The dial bears the Omega signature.

Evidence for this section
  • “The watch features a black dial equipped with painted luminous baton hour markers, an outer minute track, white sword-style hands, and a central chronograph seconds hand.”
  • “It incorporates three recessed subdials comprising a 30-minute counter at the 3 o'clock position, a 12-hour counter at the 6 o'clock position, and a small seconds register at 9 o'clock.”
  • “The dial, case, and movement bear official Omega signatures”

Movement and Identification

Power for the watch is provided by an Omega calibre 1861 manual-winding movement. This movement is identified by the number 77077839, a number which is also applied to the watch case. Official Omega signatures are reported to be present on the movement as well as the dial and case.

Documentation for the object is derived from an auction-house listing. The source indicates that the dating of the object is circa the late 1990s, noting that this is an estimate based on available evidence.

Evidence for this section
  • “It is powered by an Omega calibre 1861 manual-winding movement.”
  • “the case and movement are further identified by number 77077839.”
  • “The dial, case, and movement bear official Omega signatures”
  • “dating to the late 1990s.”

Open research questions

  • Does the movement serial number 77077839 correlate exactly with the production years within the late 1990s?
  • Are there distinct variations of the 1998/849 bracelet that would indicate if this is the original factory-fitted configuration for this reference?

Source evidence

Recorded claims and source quotations for Omega Speedmaster Professional Ref. 145/345.0808
FieldSource-reported valueSource quotation
Reference number145/345.0808“145/345.0808”
Serial number77077839“77077839”
MovementOmega calibre 1861 manual-winding movement“Omega calibre 1861 manual-winding movement”
Bracelet reference1998/849“1998/849”
Case materialStainless steel“40 mm stainless steel case”
Approximate weight135 grams“The total weight of the watch is approximately 135 grams.”
DatingCirca late 1990s“dating to the late 1990s.”

Visible details

  • The dial features painted luminous baton hour markers.
  • The stainless steel bracelet has a reference number of 1998/849.
  • The watch includes a tachymeter scale on the bezel.
  • The movement is a manual-winding Omega calibre 1861.

Research qualifications

  • The exact production date is stated as circa late 1990s rather than a precise year.
  • The source notes that credible evidence exists but classification is not fully established.

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

Consulted source

Omega Speedmaster Professional Ref. 145/345.0808 stainless steel chronograph wristwatch

Reviewed 2026-11-02 · Record 1c06c08415

Terms in this record

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

Other chronograph wristwatch records