Rolex Reference Decoder
Enter a reference number to identify the model, nickname and exact specifications
Database covering the main references since 1953. Some rare or early variants may be missing. Technical data is sourced from official Rolex catalogues and reference literature.
How to read a Rolex reference number
The Rolex reference number — four to six digits, sometimes followed by letters, engraved between the lugs at 12 o’clock — encodes the model, the bezel type and the case material. Decoding it lets you identify a watch precisely, verify a listing and compare market values on the pre-owned market.
Don’t confuse it with the serial number (engraved at 6 o’clock), which is used to date your Rolex.
Frequently asked questions
What does the last digit of a Rolex reference mean?
On most modern references it indicates the material: 0 for steel, 1 or 3 for steel and gold (Rolesor), 8 for yellow gold, 9 for white gold, for instance. Our decoder gives the detail for each reference.
What do the letters LN, LB or BLRO mean?
They describe the bezel: LN for lunette noire (black bezel), LB for lunette bleue (blue), BLRO for bleu-rouge — the famous ‘Pepsi’ of the GMT-Master line.
Where is the reference engraved on the watch?
Between the lugs at 12 o’clock, under the bracelet. It also appears on the warranty card and the original box.
Is a rare reference worth more?
Often, yes: dial variants, short runs and specific bezels drive value. Get a free estimate for your Rolex or browse our pre-owned Rolex watches in stock.