Stainless steel Omega ref. 105.012 Speedmaster Professional chronograph wristwatch, 1967 — view 1 of 5 — View 1 of 5 · Image: Somlo Antiques · original image source (opens another website in a new tab)

View 1 of 5 · Image: Somlo Antiques · original image source (opens another website in a new tab)

Wristwatches · Wristwatch

Stainless steel Omega ref. 105.012 Speedmaster Professional chronograph wristwatch, 1967

DocumentedDocumented from a dealer's listing; attribution and date as stated by the dealer.

Maker / attribution: OMEGA (maker)
Date: 1967
Historical period: Modern Mechanical Horology (1945 – 1969)
Country of origin: Unrecorded in source
Object type: Wristwatch
Materials / technique: stainless steel
Dimensions: Case 42 mm
Dealer: Somlo Antiques (dealer), London
Stock no.: O.2623
Credit line: Dealer listing, Somlo Antiques (O.2623)
Catalogue title (original): Stainless steel OMEGA ref. 105.012 Speedmaster Professional chronograph wristwatch. Made 1967 (English)

View the source record (dealer listing) ↗ (opens another website in a new tab)Suggest a correction

Record summary

Catalogued by Somlo Antiques (dealer), London (stock number O.2623), this is a wristwatch by OMEGA, dated 1967. The Atlas places it in the Modern Mechanical Horology period (1945 – 1969) of its Wristwatches collection. Materials and techniques recorded by the source: stainless steel. Recorded dimensions: Case 42 mm. The record is illustrated with 5 photographs.

Assembled from the source record's structured fields. Dates and attributions are given as the source states them; where a field is missing the Atlas leaves it blank rather than estimating.

Catalogue description

Dealer description — Somlo Antiques

The OMEGA Speedmaster reference 105.012 first appeared in the first quarter of 1964. It was the first model to feature an asymmetrical case encompassing guards to protect the crown and pushers from snagging. Brand: OMEGA Made: 1967 Model: Speedmaster Reference: 105.012 Calibre: 321 Movement: Manual Material: Stainless steel Features/complications: Chronograph and Tachymetre bezel Dial: Black matt dial with luminous painted baton indexes, outer minute/seconds divisions, outermost 1/5 second divisions featuring subsidiary seconds at 9 o’clock, 30 minute register at 3 o’clock and 12 hour register at 6 o’clock with luminous baton hands, and arrowhead centre chronograph seconds Case dimensions: 42mm Bracelet/strap: Leather strap Accessories: Extract from the Archives SKU: 02623

Historical context

Modern Mechanical Horology (1945 – 1969)

Tool watches for divers, pilots and astronauts; electric watches anticipate the electronic age.

The classic era of the mechanical wristwatch: dive watches, chronographs for motor racing and space flight, GMT watches for jet travel, slim dress watches, automatic calendars, and the rise of Japanese manufacturers alongside Swiss, American, German and Soviet industries.

Read the period in the timeline More wristwatches from this period Earlier: Golden Age of Mechanical Watchmaking

Atlas type guide

Chronographs and split-seconds watches

A chronograph is a watch with an additional seconds hand that can be started, stopped and returned to zero independently of the timekeeping. Louis Moinet built an early example in 1816 and Nicolas Rieussec a recording 'chronographe' in 1821; Adolphe Nicole's heart-shaped reset cam (patented 1862) made the modern return-to-zero possible. Split-seconds (rattrapante) chronographs add a second hand that can be stopped for intermediate times; flyback chronographs restart instantly.

Chronographs were essential tools for doctors (pulsometer scales), artillery (telemeter), engineers and sport. In wristwatches, Valjoux, Venus, Lemania and later the automatic chronographs of 1969 (Zenith El Primero, the Chronomatic Calibre 11 group and Seiko 6139) are milestones.

What to look for

Push-pieces on the case band or a single button in the crown (monopusher).
Subsidiary registers for minutes and hours; tachymeter, telemeter or pulsometer scales.
Column wheel versus cam control visible in the movement.
Calibre markings of specialist makers (Valjoux, Lemania, Venus, Landeron).

Dating clues

Pocket chronographs with heart cam reset: after 1862.
Wrist chronographs: from c. 1910; two-button designs from the 1930s.
Automatic chronographs: from 1969.

General guidance written by the Atlas editors about this kind of object. It is not a statement about this particular piece; for that, rely on the source record above and on physical examination.

Mechanisms mentioned

Chronograph — Complication

Record completeness

Maker or attributionRecorded
DateRecorded
Place or countryNot in source
MaterialsRecorded
DimensionsRecorded
Narrative descriptionRecorded
Inscriptions / marksNot in source
ProvenanceNot in source
Several photographsRecorded

Editorial status: Documented — facts as published by the source; not independently verified by Atlas editors.

Explore further

Sources & image rights

Record source: Somlo Antiques (dealer), London (opens another website in a new tab).

Image rights: © Somlo Antiques — dealer photographs; permission required (opens another website in a new tab).

Images are hosted by the Atlas for study and credited to their owner. Rights holders may request correction, credit changes or removal, or grant permission, via the editorial office.

Cite this record

"Stainless steel Omega ref. 105.012 Speedmaster Professional chronograph wristwatch, 1967." Somlo Antiques (dealer), London, O.2623. Catalogue record in The Horology Atlas, WatchMuseum.org, https://atlas.watchmuseum.org/museum/stainless-steel-omega-ref-105-012-speedmaster-professional-chronograph-bcce7c.