Omega serial and reference

A movement serial gives an approximate year up to about 2007. After that the year can’t be read from it. A 14-digit reference gives the collection and specs.

Recent watches: the serial is on the warranty card and engraved on the caseback or a lug. Vintage: usually inside the caseback and on the movement. Spaces, dots and apostrophes are fine.

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Not proof of authenticity. Counterfeits carry real serial numbers. Omega itself says even its archive extract is not proof of authenticity.

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Before 1940RoughNot checked against archive dates

1940s–1950sRuns earlyReal dates often 2–4 years after the table

1960sClosestWithin about 2 years

1970sApproximateWithin about 2 years

1980–2007RoughNot checked against archive dates

81 million and upNo yearSame range issued again from about 2019

Year windows checked against 39 watches from 1941–1978 with archive or catalog production dates. The year table and the separate Speedmaster table come from collectors, not from Omega. Sources

How to read an Omega serial

Collectors use a table that gives the earliest production year for each million of movement numbers – 25 million, for example, starts in 1967. Omega doesn’t publish it. Checked against watches from 1941–1978 with archive or catalog production dates, it is close in the 1960s, within about two years in the 1970s, and tends to run early for the 1940s and 1950s. We found no archive-dated watches from before 1940 or from 1980–2007, so those years are rougher: one watch in the 80 million range was sold new four years before its table year.

From about 81 million (around 2007) the table stops working: the numbers kept rising slowly into the late 2010s, and since about 2019 Omega has also issued numbers in the 82–84 million range to new models, so the same number could be 2007 or 2021. The published table also has a gap: 51 million is missing and 52 million is marked unused. Serials with a letter and six digits are the current format and carry no year either. Speedmaster Professional watches from about 1999 to 2021 use their own block between 77 and 79 million.

The 14-digit reference

References like 310.30.42.50.01.002 follow Omega’s own codification: collection, case and bracelet material, diameter in whole millimeters, movement type and complications, dial color, then a variant number. We name the collection only for codes confirmed on Omega’s pages.

What the serial can’t tell you

Whether the watch is genuine: real numbers are copied onto counterfeits.
The exact year. The movement can be older than the watch – some ladies’ movements and anniversary editions were cased years later.
The model, size or material. That is the reference’s job.
Anything from a vintage case number: it runs separately from the movement number.

Genuine watches that confuse decoders

Serials with a letter – Omega’s own FAQ lists them.
Case number and movement number that differ on a vintage watch.
A recent Moonwatch whose number looks like 2007.
The same serial in several listings: one watch is often resold many times.
A reference suffix like -68 is a case version, not the year.