Speedmaster

Omega Speedmaster ST105.012

Speedmaster Professional

42mm
Steel
Caliber 321
1964 to 1968
Men's

The Omega Speedmaster, reference ST105.012. Produced 1964 to 1968. Below are the full specifications, plus what each part of the reference number means. If you own this reference and want to know what it is worth today, we buy it outright and appraisals are complimentary.

Inquire Tell us what you are looking for Sell us yours Complimentary appraisal Inquire about this reference Any year, dial or bracelet · we will hunt it

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GIA-trained appraisers · 20 years in downtown San Diego · 100% certified authentic

Full specifications

Case

Case size	42mm
Case material	Steel
Lug width	20mm
Crystal	Acrylic (hesalite)

Bezel

Bezel type	Tachymeter
Bezel material	Aluminum

Dial

Dial color	Black
Lume	Tritium

Movement

Movement	Caliber 321
Caliber	321
Beat rate	18000 vph
Jewels	17
Functions	Chronograph, tachymeter

Reference

Wears as	Men's
Produced	1964 to 1968

How the ST105.012 compares

Side by side with the other Omega Speedmaster references we document. Only the specs that actually differ are listed.

ST105.012 vs 105.002

Spec	ST105.012	105.002
Case size	42mm	39.7mm
Produced	1964 to 1968	1962 to 1963

ST105.012 vs 105.003

Spec	ST105.012	105.003
Case size	42mm	39.7mm
Produced	1964 to 1968	1963 to 1968

ST105.012 vs 145.012

Spec	ST105.012	145.012
Produced	1964 to 1968	1967 to 1968

More Omega Speedmaster references

Speedmaster

105.002

Speedmaster

105.003

Speedmaster

105.012

Speedmaster

145.012

See all Omega Speedmaster references ›

Common questions about the Omega Speedmaster ST105.012

How big is the Omega Speedmaster ST105.012?

The case measures 42mm across, with a 20mm lug width. Case material: Steel. Case size alone is a poor guide to how a watch wears; lug-to-lug length and how the bracelet drops off the case matter more, which is why we suggest trying one on before you commit.

What movement is in the ST105.012?

Caliber 321. It beats at 18,000 vph. The movement uses 17 jewels.

When was the Omega Speedmaster ST105.012 made?

Omega produced this reference from 1964 to 1968. Production years matter when you are valuing one, because dial, bezel and bracelet details often changed inside a single reference run.

Does the ST105.012 have a nickname?

Speedmaster Professional. Collector nicknames are not official Omega names, but they are what people actually search for and what they are called across a showroom.

Does San Diego Jewelry Buyers buy the Omega Speedmaster ST105.012?

Yes. We buy this reference outright, and we lend against it if you would rather keep it. We are a family-owned San Diego buyer established in 2006, our appraisers are GIA-trained, and the appraisal is complimentary with no obligation to sell. You can bring it to our Gaslamp showroom at 907 Sixth Ave or start online. If you are looking to buy this reference instead, tell us and we will let you know when one comes in.

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Interested in a Speedmaster ST105.012?

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Own a Speedmaster ST105.012?

We buy this reference outright, and we lend against it. Bring it to our Gaslamp showroom or start online. Appraisals are complimentary and there is no obligation to sell.

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