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Rolex Reference Tool
Every Rolex carries a serial number engraved into the case — and for watches made before 2010, that number reveals the year it was produced. Enter yours below to find out, or read our guide on exactly where to find it.
Enter the serial exactly as engraved — letters and numbers, no spaces. Don't have it yet? See where to find your serial number.
The Guide
Depending on when your Rolex was made, the serial number lives in one of two places. It's a short string of numbers — or, on later watches, a letter followed by numbers. You'll likely need a loupe or a good macro photo to read it clearly.
The classic location. Remove the bracelet or strap and look at the edge of the case between the lower lugs — the spot at the 6 o'clock side, hidden behind the bracelet. The serial is engraved into the metal of the case itself. The model reference number sits in the same way between the upper lugs at 12 o'clock.
Around 2005 Rolex began laser-engraving the serial onto the rehaut — the inner flange ring between the dial and the crystal — at the 6 o'clock position. By roughly 2008 this became the only place the serial appears. You'll also see "ROLEX" repeated around the rehaut on these models. No need to remove the bracelet: just angle the watch under light and read the engraving at 6 o'clock.
A note on 2010 and later. Starting around 2010, Rolex switched to fully randomized serial numbers that no longer encode a production year. If your serial is on the rehaut and our tool reports a random-era result, that's expected — the watch can usually still be dated from its papers, model reference, or specific dial and movement details.
Reference
Rolex used sequential numeric serials from the 1920s into the late 1980s, then moved to a letter-prefix system, and finally to randomized serials in 2010. The chart below shows the approximate starting serial for each production year. Because Rolex didn't publish official records, these are widely accepted estimates — treat the result as a close approximation, not a guarantee.
| Serial Number | Approx. Year |
|---|
Letter-prefixed serials (≈1987–2009) were not strictly sequential, so a single prefix can span two years. Serials from 2010 onward are randomized and cannot be dated by serial alone.
Common Questions
For watches made before about 2010, yes — to within roughly a year. Rolex never released official serial records, so every chart (including ours) is an expert estimate based on documented examples. For watches from 2010 on, serials are randomized and no longer encode the year.
From around 1987 to 2009, Rolex prefixed serials with a letter (for example R, L, E, or later K, Y, F, D, M, V, Z). Each letter corresponds to a production period, though the letters were not issued in alphabetical order and some overlap two years.
On the rehaut — the inner ring between the dial and crystal — at the 6 o'clock position. Older watches have it engraved between the lower lugs, behind the bracelet.
No. The serial number is unique to your individual watch and indicates its age. The model (reference) number identifies the model and is engraved between the upper lugs at 12 o'clock, or also appears on the rehaut on newer pieces.
Sutcliffe Hansen
We're certified watchmakers specializing in fully documented vintage restoration — every service captured with a real-time photo timeline. If your Rolex is ready for expert care, we'd love to take a look.
