Rolex has never published an official serial-to-year list. Every chart in circulation, including this one, is compiled by dealers and collectors from watches and papers they have handled. The charts broadly agree, but letter series overlapped and production did not switch prefixes on the first of January, so treat every year below as approximate.
Rolex serial number chart by year
The years below are the approximate start of each series, taken from the consensus of widely published dealer and collector charts. Where the charts disagree by a year, the note says so.
| Serial format | Approximate production start | Notes |
|---|---|---|
| Numeric | Up to 1987 | Passed 999,999 in the early-to-mid 1950s and restarted at 100,000, so a six-digit serial can belong to either run. Ended at about 9,999,999 in 1987. |
| R | 1987 | The first letter prefix, after the numeric run ended |
| L | 1988 to 1989 | Some charts list it from 1989 |
| E | 1990 | |
| X | 1991 | A short series, overlapping with N |
| N | 1991 | |
| C | 1992 | |
| S | 1993 | Some charts extend it into 1994 |
| W | 1994 to 1995 | |
| T | 1996 | Some charts start it in 1995 |
| U | 1997 | Some charts extend it into 1998 |
| A | 1998 to 1999 | |
| P | 2000 | Some charts start it in 1999 |
| K | 2001 | Some charts start it in 2000 |
| Y | 2002 | Some charts start it in 2001 |
| F | 2003 to 2004 | Some charts extend it into 2005 |
| D | 2005 | Rehaut serials begin around this time |
| Z | 2006 | |
| M | 2007 to 2008 | |
| V | 2008 to 2009 | |
| G | 2010 | The last letter series |
| Random (8 characters) | From about late 2010 | Letters and digits in no sequence; the serial no longer dates the watch |
Letter-prefix serials are one letter followed by six digits. Random serials mix eight letters and digits. The format alone therefore places a watch before 1987, between 1987 and 2010, or after about 2010, before you even open the chart.
Where to find the serial number on a Rolex
Where you look depends on when the watch was made:
- Before about 2005: the serial is engraved on the case between the lugs at 6 o’clock, hidden by the bracelet. The reference is between the lugs at 12 o’clock. The bracelet has to come off to read either.
- About 2005 to 2008: Rolex began engraving the serial on the rehaut, the inner ring between the dial and the crystal, at 6 o’clock. Watches from these years often carry it in both places, and the two numbers must match.
- From about 2008: the serial is on the rehaut only. The reference is still between the lugs at 12 o’clock.
- Inside vintage casebacks: many older Rolex casebacks carry the reference and a quarter-and-year stamp on the inside, which a watchmaker can read with the back off. That helps separate watches from the two six-digit runs of the 1950s.
The serial is also on the papers: the warranty card lists the model and serial along with the date of sale. That date tells you when the watch was sold, which can be months or even years after it was made.
What a Rolex serial can and cannot tell you
It can give an approximate production year
For numeric and letter-prefix serials, the chart gives a year or a two-year window. For a watch sold as, say, a mid-1990s Submariner, that is a quick first consistency check.
It cannot date a random serial
Serials issued from about late 2010 are random, so two watches made in the same month have unrelated numbers. Use the warranty card date, which is the sale date, or service records to place the watch in time.
It cannot prove the watch is genuine
Counterfeiters engrave real serials copied from genuine watches and online photos. A serial that “checks out” on a chart only shows that its format is plausible for the era.
It cannot tell you what has been replaced
The serial belongs to the case. The dial, hands, bezel, bracelet and even the movement can be changed during service or repair, and the serial will not show it.
There is no official public lookup
Rolex does not publish production records, and there is no Rolex website where you type a serial and get a year. Every public chart and serial checker is compiled by third parties.
How to date a Rolex from its serial
Find the serial
On a watch from about 2008 onward, read it on the rehaut at 6 o’clock with the watch tilted towards the light. On older watches, have the bracelet removed and read the case between the lugs at 6 o’clock. Photograph it rather than copying it by eye.
Identify the format
All digits, one letter followed by six digits, or a random mix of eight letters and digits? The format alone places the watch before 1987, between 1987 and 2010, or after about 2010.
Read the chart
Match the prefix or the numeric range to the chart above and note the year window. Allow a year either side, because series overlapped and the charts are compiled, not official.
Cross-check it with the reference
Read the reference between the lugs at 12 o’clock and check that its production run covers your year window. A serial from a year when that reference was not being made is a mismatch that needs an explanation.
Confirm it with the papers and service history
Compare the warranty card date and any service receipts with the serial year. A sale a year or two after production is normal. A card dated before the watch could have been made is not.
Rolex serial number red flags
None of these proves a watch is fake on its own, but each needs a convincing explanation before any money changes hands.
- A serial that does not fit the reference. A letter-prefix serial on a Submariner 126610LN, a reference launched in 2020, is a mismatch. So is a random serial on a watch sold with papers dated 2005. Know the reference’s production window and check the serial falls inside it.
- A serial on the outside of the caseback. Modern Rolex casebacks are plain on the outside, with a few exceptions such as the gas escape valve text on the Sea-Dweller and the display backs on a handful of recent dress and precious-metal models. A serial, or “Rolex Oyster” text, engraved on the outside of a modern caseback is a classic counterfeit tell. The earliest Rolex watches are a different story, so judge true vintage pieces with a specialist.
- A serial that does not match the papers. The number on the rehaut or between the lugs should match the warranty card exactly. So should the reference.
- Two different serials on one watch. On a watch from the 2005 to 2008 transition that shows a serial in both places, the rehaut and the lug engraving must be identical.
- A serial you have seen before. Counterfeiters copy one genuine serial onto many watches. If the number turns up in other listings or photos online, ask why. Search it, and check it against a stolen-watch register such as The Watch Register.
- Poor engraving. A genuine rehaut serial is crisp, evenly spaced and centred at 6 o’clock. Printed, blurred, uneven or off-centre numbers are a warning.
Keep the serial off public photos
Since about 2008 the serial sits on the rehaut, legible in any sharp dial photo taken at a slight angle. That makes it easy to copy onto a counterfeit or a fake warranty card. Blur it before you post photos in a listing or on a forum, and share the full number privately with a serious buyer or your insurer. Our guide to reference and serial numbers covers the same precautions for other brands.
Before you buy a Rolex
Dating is one step in checking a used Rolex. The Rolex guide covers the dial, rehaut, bezel and bracelet details worth checking; how to spot a fake Submariner goes deeper on the most copied model; and the buyer’s walkthrough and Chrono24 checklist cover sellers, photos and payment. If you only know what the watch looks like, start with the AI watch identifier, and once you have a reference, check what it is worth.