Vintage Omega Reference Codes

Omega Codes

A guide to reference codes for Vintage Omega watches

The 3 digit prefix is shown in the table below.

Omega Speedmaster Professional for example, would carry the code 145.0022

1= Gents

4– Hand wound chronograph

5– Water resistant

1 – Gent’s Watch 1 – Manual winding without second
1 – Non-water-resistant
2 – Gent’s Jewellery Watch 2 – Manual winding small second
2 – Non-water-resistant calendar
3 – Gent’s Bracelet Watch 3 – Manual winding centre second
3 – Non-water-resistant chronometer
4 – Gent’s Jewellery Bracelet Watch 4 – Manual winding chronograph
4 – Non-water-resistant chronometer calendar
5 – Lady’s Watch 5 – Self-winding without second
5 – Water-resistant
6 – Lady’s Jewellery Watch 6 – Self-winding centre second
6 – Water-resistant calendar
7 – Lady’s Bracelet Watch 7 – Self-winding chronograph
7 – Water-resistant chronometer
8 – Lady’s Jewellery Bracelet Watch 8 – Electronic chronograph
8 – Water-resistant chronometer calendar
  9 – Electronic

Omega had a standard 5 digit case reference which was replaced  in the  1960’s. It was replaced to show the case design as the Omega range had expanded substantially.

The new code format 123.4567 is still being used today. The new 3 digit prefix  at the beginning explains details about the case design.

It explains if it is a Mens Omega or Ladies Omega, the water resistant standards and the type of movement, either manual hand wound, quartz or automatic inside your Omega watch.

The last 4 digits show the actual model number.

All original Omegas have the particular watch serial number  stamped on the movement itself or on the case back or  where the bracelet attachment is, especially on later watches 1998 onwards.

We can help with your Omega serial numbers and help to date your watch.