Identify a Rolex: Reference, Serial and Model Guide

Rolex engraves the reference number on the case itself, not on the dial or caseback.

• Between the lugs at 12 o'clock. On Rolex watches made since the mid-20th century, the reference is engraved on the case flank at 12 o'clock, hidden by the bracelet end link. The serial number sits in the same position at 6 o'clock. You need to remove the bracelet or push the spring bar aside to read them.
• On the rehaut. Since the mid-2000s, Rolex has engraved the inner bezel ring (the rehaut) with a repeating ROLEX ROLEX ROLEX pattern, and the serial number appears at 6 o'clock. On most modern watches the reference is not on the rehaut, only the serial.

If the watch comes with its warranty card or the older paper guarantee, the reference is printed there next to the serial.

Rolex does not engrave reference numbers on the caseback. An external caseback engraving is a reason for caution; see our guide on how to spot a fake luxury watch.

A Rolex reference is four to six digits, sometimes followed by letters: the leading digits identify the model family, the last digit usually the case material, and the suffix the bezel.

Reference	Model	How to read it
126334	Datejust 41	1263 Datejust 41 family, 3 fluted bezel, 4 white Rolesor
228238	Day-Date 40	2282 Day-Date 40 family, 3 fluted bezel, 8 yellow gold
126610LN	Submariner Date	1266 Submariner Date family, 0 steel, LN black bezel
126710BLRO	GMT-Master II	1267 GMT-Master II family, 0 steel, BLRO blue and red bezel
116500LN	Cosmograph Daytona	1165 Daytona family (2016 to 2023), 0 steel, LN black bezel

Material codes: 0 steel, 1 Everose Rolesor, 3 yellow Rolesor, 4 white Rolesor, 5 Everose gold, 6 platinum, 8 yellow gold, 9 white gold. On the Datejust and Day-Date the second-to-last digit describes the bezel (0 smooth, 3 fluted); on sports models the suffix matters: LN black, LB blue, LV green, BLRO blue and red, BLNR blue and black, CHNR brown and black. These are patterns, not rules; see watch reference numbers explained for other brands.

The serial number is unique to each watch and is the number dealers and insurers record. Dating from the serial works in broad strokes only:

• Older watches carry an all-numeric serial. Collectors use published production charts to place these within a year or two, though the charts are approximate and Rolex has never confirmed them.
• From the late 1980s, serials begin with a letter (R, L, E, X, N, C, S, W, T, U, A, P, K, Y, F, D, Z, M, V, G) followed by digits. Each letter corresponds roughly to a production period.
• Since 2010, all Rolex serials are random eight-character strings of letters and digits. They cannot be used to date a watch.

For a modern watch the warranty card date is the only reliable indicator; for older pieces, original papers or a dated service record beat any chart.

A serial alone never confirms authenticity. Serials are copied onto fakes, and only Rolex, through an authorised dealer or service centre, can check one against its records.

Most Rolex watches can be sorted into a collection from a single clear photo of the dial side. These are the cues that matter.

• Submariner: unidirectional 60-minute dive bezel, Mercedes hands, luminous circle and rectangle indices, Oyster bracelet. The Submariner Date has a Cyclops; the no-date 124060 does not.
• GMT-Master II: 24-hour bezel, usually two-tone, with a fourth arrow-tipped hand. Jubilee or Oyster bracelet.
• Daytona: three subdials, tachymetre bezel, screw-down chronograph pushers.
• Datejust: date at 3 o'clock with Cyclops, fluted or smooth bezel, baton or Roman indices, Jubilee or Oyster bracelet. Sizes 31, 36 and 41 are common.
• Day-Date: day spelled out in a window at 12 o'clock, always precious metal, usually on a President bracelet.
• Explorer: 3-6-9 numerals, black dial, smooth bezel, no date.
• Oyster Perpetual: time only, no date, smooth bezel, often bright lacquer dials on recent references.
• Sea-Dweller and Deepsea: thick case, helium valve on the left flank, red text on some Sea-Dweller dials.

Case size, bezel and dial colour then narrow it to a few references.

Several models are routinely mixed up, both among Rolex watches and with other brands.

• Submariner vs Sea-Dweller. The Sea-Dweller is thicker, has a helium escape valve on the 9 o'clock side and, on recent references, a Cyclops over the date. Older Sea-Dwellers have no Cyclops.
• Datejust vs Day-Date. If there is a day window at 12 o'clock it is a Day-Date. A Datejust shows only the date at 3 o'clock.
• Explorer vs Oyster Perpetual. The Explorer has 3-6-9 numerals; the Oyster Perpetual uses baton indices.
• GMT-Master vs GMT-Master II. Both have 24-hour bezels; the II has an independently adjustable hour hand and is the one in current production.
• Tudor. Tudor is Rolex's sister brand and shares case styles. Look for the Tudor rose or shield on the dial and crown instead of the Rolex coronet.
• Homage watches. Many brands sell dive watches shaped like a Submariner. The dial text, crown logo and bracelet clasp give them away.

If you are weighing a Rolex against an Omega Seamaster or Speedmaster, our Omega identification page describes the equivalent cues on that side.

A good photo gets you to a model and a short list of references.

1. Shoot the dial straight on in daylight or soft indoor light. Avoid flash, which blows out the crystal and hides the dial text.
2. Make sure the bezel, hands, indices and dial text below the crown logo are readable. The lines of text at 6 o'clock often state the movement type and depth rating, which narrows the reference.
3. If you can, add a second photo of the case side showing the crown and bracelet clasp.

WatchID compares the image against a reference database and returns ranked candidates with model name and reference. For a steel black-bezel Submariner Date it will typically propose the current 126610LN alongside the earlier 116610LN, because the two differ in details a photo may not resolve.

The result is an identification, not an authentication. To confirm what you have, compare the suggested reference with the engraving between the lugs. For the full method, read how to identify a Rolex watch and our guide to identifying a watch from a photo.