How to find your Rolex reference number, and what it tells you

Before you can value, insure, service or sell a Rolex, you need its reference number. It's the single most important fact about the watch: it tells a buyer which model, which generation and which version you have, and every price on WristPrices is organized by it. This guide shows you where to find it, how to tell it apart from the serial number, and how to read what its digits and letters say. It ends with a step-by-step you can follow with the watch in front of you.

Reference number vs serial number

A Rolex carries two different numbers, and mixing them up is the most common mistake owners make.

The reference is what you look up to find a price. The serial is what proves the papers belong to your watch. Our guide to dating a Rolex by its serial number covers the second.

Where to find the reference number

1. The warranty card or papers

The easiest place. The warranty card or the original paperwork that came with the watch usually lists both the reference and the serial number. On older watches the papers may look different from today's card, but they serve the same purpose.

2. Receipts and service records

Original purchase receipts, insurance schedules and service receipts often name the reference. A service receipt from a reputable watchmaker usually lists both numbers.

3. Between the lugs at 12 o'clock

The reference is engraved on the case between the lugs on the 12 o'clock side, under the bracelet or strap. To read it, the bracelet has to come off. If you're not used to spring bars, have a watchmaker or jeweler do it; it takes them a minute and avoids scratching the lugs.

4. Not on the rehaut

On watches made from the mid-2000s on, you'll see an engraving on the inner ring under the crystal, at 6 o'clock. That's the serial number, not the reference. Collector guides date the move to 2005, give or take; all current models show the serial there only.

5. Match by specifications

If you have no papers and can't remove the bracelet, you can narrow it down from what you can see: the collection name on the dial, case size, bezel type and color, dial, date or no date, and bracelet. Our full Rolex reference list lists the case size, material, bezel and production years for every reference we track, with photos where we have them. Treat a match by eye as provisional until you've read the number on the case or the papers.

What the reference number tells you

The number of digits

The length of the reference is a rough guide to the watch's era. According to Crown & Caliber:

Six-digit references often build on an earlier five-digit one with a digit added in front. Crown & Caliber gives the Explorer II as an example: 16570, then 216570. Our catalog records the Explorer II 216570 as made from 2011 to 2021, after the 16570's run from 1989 to 2010.

The last digit: the material

According to Crown & Caliber, the final digit of the number describes the case material. Its key lists 0 for stainless steel, 8 for 18k yellow gold and 9 for 18k white gold. Examples from our catalog fit the pattern:

• 126610LN ends in 0: Oystersteel.
• 126613LB ends in 3: steel and yellow gold (yellow Rolesor).
• 126334 ends in 4: steel with a white gold bezel (white Rolesor).
• 128238 ends in 8: 18k yellow gold.

Treat the digit as a strong hint, not proof: guides note exceptions among older four-digit references, so check the catalog entry for your reference rather than relying on the digit alone.

The letters: usually the bezel

Letters after the number usually describe the bezel color. Crown & Caliber lists LN for black, LV for green and BLRO for blue and red. Our catalog adds examples such as BLNR, a black and blue bezel on the GMT-Master II 126710BLNR, and GRNR, a grey and black bezel on the 126710GRNR.

Why the exact reference matters for price

Watches that look nearly identical can sell at very different levels. Here are three generations of the black Submariner Date, all with a black dial and black bezel:

The Rolex Submariner Date 16610 was made from 1988 to 2010 with calibre 3135 and a 40 mm case. The Rolex Submariner Date 116610LN kept the 40 mm case and calibre 3135 but added a black Cerachrom bezel insert, and was made from 2010 to 2020. The Rolex Submariner Date 126610LN is the current model, with a 41 mm case and calibre 3235. Value your watch from the wrong one and your number will be off. Browse the Submariner collection to see every generation side by side.

When the numbers don't line up

Sometimes the reference on the papers, the reference on the case and the look of the watch don't agree. Don't panic, but don't ignore it either:

• Papers list a different reference from the case. The papers may belong to another watch. Buyers will treat the watch as having no papers, and may ask harder questions.
• The serial seems too old or too new for the reference. Collector guides note that a serial from a different era than the model can point to a replacement case fitted during a service, or to tampering. A service receipt can explain the first.
• The dial or bezel doesn't match the reference's catalog entry. Parts can be swapped during a service or by a previous owner. Note what you see and mention it when you sell.

In each case, the honest move is to describe exactly what you have. A buyer or dealer will find it anyway, and disclosure keeps the sale on track.

Step-by-step: find your reference in five minutes

1. Find your papers. Look for the warranty card, certificate, original receipt or any service receipt. If one lists a reference, write it down and skip to step 5.
2. Look at the dial and case. Note the collection name on the dial, the bezel color, date or no date, and the bracelet.
3. Check the rehaut. If there's an engraved number at 6 o'clock under the crystal, that's the serial. Write it down separately.
4. Read between the lugs. If you still need the reference, have the bracelet removed and read the engraving at 12 o'clock.
5. Look it up. Search for the reference on WristPrices and check that the photos, case size and bezel match your watch.

What to do once you have it

With the reference in hand, you can see what your watch sells for. Each reference page shows the range for a pre-owned watch with box and papers, the watch-only range where we have enough sales, and every recent sold result with its date, condition and source. Our valuation guide explains how to place your watch within the range.

If you're thinking of selling, our sell my Rolex page asks for exactly this: your reference, its condition and whether you have box and papers. It shows the typical range for that combination where we have enough sales, and lets you start a sell request. A person reviews every request, and when an independent dealer is a fit, we share the details you agreed to so they can make you an offer. We're an independent price guide; we don't buy, authenticate or appraise watches.