Omega Serial Number Lookup
Identify the approximate production year of your Omega watch from its serial number, or decode a modern Omega reference number to discover the collection, case material, and size.
Where to find your serial number: On most Omega watches the serial number is engraved on the caseback. It is a purely numeric sequence \u2014 do not confuse it with the reference number, which uses a dot-separated format (e.g., 210.30.42.20.01.001). Omega has used a sequential numeric system since approximately 1895, making year estimation possible for the entire brand history.
Enter your Omega serial number (e.g., 28500000, 75000000). Serials are purely numeric, typically 6\u20139 digits.
Popular Omega Reference Numbers
A selection of well-known Omega references with their decoded descriptions. Use the decoder tool above for any reference not listed here.
| Reference | Description |
|---|---|
| 210.30.42.20.01.001 | Seamaster Diver 300M, 42mm, Steel, Blue Dial |
| 210.30.42.20.03.001 | Seamaster Diver 300M, 42mm, Steel, Black Dial |
| 210.30.44.51.03.001 | Seamaster Diver 300M, 44mm, Steel & Yellow Gold, Black Dial |
| 210.22.42.20.01.004 | Seamaster Diver 300M, 42mm, Steel, Blue Ceramic Dial |
| 215.30.44.22.01.001 | Seamaster 300 Master Co-Axial, 41mm, Steel, Black Dial |
| 220.10.38.20.03.001 | Seamaster Aqua Terra, 38mm, Steel, Black Dial |
| 220.12.41.21.02.001 | Seamaster Aqua Terra, 41mm, Steel, Silver Dial |
| 231.10.42.21.01.004 | Seamaster Planet Ocean, 42mm, Steel, Blue Dial |
| 232.30.42.21.04.001 | Seamaster Planet Ocean, 42mm, Steel, Blue Dial (vintage ref) |
| 311.30.42.30.01.005 | Speedmaster Professional Moonwatch, 42mm, Steel |
| 311.30.40.30.01.001 | Speedmaster Professional "First Omega in Space", 40mm, Steel |
| 304.30.44.52.03.001 | Speedmaster '57 Co-Axial, 40.5mm, Steel, Black Dial |
| 332.10.41.51.01.001 | Speedmaster Racing Master Chronometer, 44.25mm, Steel |
| 130.33.39.21.03.001 | Constellation, 39mm, Steel, Blue Dial |
| 131.10.39.20.06.001 | Constellation, 39mm, Steel, MOP Dial |
| 424.10.40.20.01.001 | De Ville Prestige, 40mm, Steel, Silver Dial |
| 431.10.41.21.01.001 | De Ville Hour Vision, 41mm, Steel, Silver Dial |
| 511.10.39.20.02.002 | Globemaster Annual Calendar, 39mm, Steel, Blue Dial |
Serial Number Year Range Guide
Omega has used a sequential numeric serial system since ~1895. Each range below corresponds to the approximate production years for watches bearing those serial numbers. Ranges are listed newest first.
| Serial Range | Approximate Years |
|---|---|
| 93,000,000–105,000,000 | 2015–2020+ |
| 83,000,000–92,999,999 | 2010–2014 |
| 67,000,000–82,999,999 | 2005–2009 |
| 58,000,000–66,999,999 | 2000–2004 |
| 52,000,000–57,999,999 | 1995–1999 |
| 46,000,000–51,999,999 | 1990–1994 |
| 41,500,000–45,999,999 | 1985–1989 |
| 38,300,000–41,499,999 | 1980–1984 |
| 34,000,000–38,299,999 | 1975–1979 |
| 28,800,000–33,999,999 | 1970–1974 |
| 22,500,000–28,799,999 | 1965–1969 |
| 17,800,000–22,499,999 | 1960–1964 |
| 14,800,000–17,799,999 | 1955–1959 |
| 13,300,000–14,799,999 | 1950–1954 |
| 12,000,000–13,299,999 | 1945–1949 |
| 11,200,000–11,999,999 | 1940–1944 |
| 10,100,000–11,199,999 | 1935–1939 |
| 9,100,000–10,099,999 | 1930–1934 |
| 8,100,000–9,099,999 | 1925–1929 |
| 6,700,000–8,099,999 | 1920–1924 |
| 5,200,000–6,699,999 | 1915–1919 |
| 3,700,000–5,199,999 | 1910–1914 |
| 2,400,000–3,699,999 | 1905–1909 |
| 1,400,000–2,399,999 | 1900–1904 |
| 1–1,399,999 | 1895–1899 |
Reference Number Decoder Guide
Modern Omega references follow the structure: [collection].[material].[size mm].[bracelet].[dial].[strap ref]. For example, 210.30.42.20.01.001 breaks down as 210 (Seamaster Diver 300M) | 30 (Stainless Steel) | 42 (42mm case) | 20.01.001 (bracelet, dial, and strap reference). The first two groups identify the collection and material.
Collection Codes (Group 1)
| Code | Collection |
|---|---|
| 120 | Constellation |
| 123 | Constellation |
| 130 | Constellation |
| 131 | Constellation |
| 210 | Seamaster Diver 300M |
| 212 | Seamaster |
| 213 | Seamaster |
| 215 | Seamaster 300 |
| 220 | Seamaster Aqua Terra / Railmaster |
| 231 | Seamaster Planet Ocean |
| 232 | Seamaster Planet Ocean |
| 233 | Seamaster Planet Ocean Chronograph |
| 234 | Seamaster Planet Ocean Ultra Deep |
| 304 | Speedmaster '57 |
| 310 | Speedmaster |
| 311 | Speedmaster Professional Moonwatch |
| 321 | Speedmaster Speedy Tuesday |
| 326 | Speedmaster Reduced |
| 327 | Speedmaster |
| 332 | Speedmaster Racing |
| 422 | De Ville |
| 424 | De Ville Prestige |
| 425 | De Ville Prestige Co-Axial |
| 426 | De Ville |
| 431 | De Ville Hour Vision |
| 433 | De Ville Trésor |
| 435 | De Ville Ladymatic |
| 511 | Globemaster |
| 522 | Speedmaster Racing Master Chronometer |
| 525 | Seamaster Bullhead |
| 2503 | Railmaster |
Case Material Codes (Group 2)
| Code | Material |
|---|---|
| 10 | Stainless Steel |
| 20 | Stainless Steel |
| 30 | Stainless Steel |
| 50 | Yellow Gold |
| 53 | Steel & Yellow Gold (bicolor) |
| 55 | Sedna® Gold (Rose Gold alloy) |
| 58 | White Gold |
| 60 | Titanium |
| 63 | Titanium |
| 65 | Titanium & Bronze |
| 70 | Platinum |
| 90 | Stainless Steel & Rubber |
All serial number year ranges are estimates based on documented Omega production records. Exact production dates may vary by 1\u20133 years. Reference number decoding reflects Omega's modern dot-separated format; vintage or special edition references may use a different scheme.
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Shop Pre-Owned OmegaFrequently Asked Questions
On most Omega watches the serial number is engraved on the caseback. On vintage models it may appear on the movement itself, visible through a display caseback. The serial is a purely numeric sequence (no letters), typically 7–9 digits on watches made after 1960. Do not confuse it with the reference number, which uses a dot-separated format on modern pieces.
You can estimate the production year using the serial number. Omega has used a continuous sequential numeric system since approximately 1895, making it one of the best-documented serial databases in horology. Enter your serial in the lookup tool above and it will return the approximate 5-year production window.
No. The year ranges provided are estimates based on well-established historical production records. Omega manufactured watches in large batches and serials were not assigned on exact calendar dates. The ranges are accurate to within approximately 1–3 years. For a precise production date, Omega SA can sometimes provide records for registered or recently serviced watches.
Modern Omega references use a dot-separated format with up to 6 groups: [collection].[material].[size mm].[bracelet type].[dial code].[strap reference]. For example, 210.30.42.20.01.001 decodes as: 210 (Seamaster Diver 300M) | 30 (Stainless Steel) | 42 (42mm case) | 20 (bracelet) | 01 (blue dial) | 001 (bracelet reference). The first two groups are the most useful for identifying the model and material.
A serial number lookup can confirm whether your serial falls within a plausible production range, but it cannot prove authenticity. To verify an Omega, check for the correct caseback engravings, examine the movement quality (Co-Axial and Master Chronometer movements have distinctive finishing), and compare the reference number against official Omega documentation. Gray and Sons authenticates all pre-owned Omega watches before listing them for sale.