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Find Your Watch’s Reference and Serial Number

The reference number identifies the model and configuration, and it is the number a buyer needs to quote. The serial number identifies your individual watch. On most modern Rolex references the reference is engraved between the lugs at 12 o’clock and the serial at 6 o’clock or on the rehaut, the inner ring around the dial. Share the reference freely. Keep the serial to yourself until you are dealing with a buyer you trust.

6 minute read

These two numbers get mixed up constantly, and the distinction matters because one of them is safe to post publicly and the other is not.

What each number is

	Reference number	Serial number
Identifies	The model and configuration	Your individual watch
Shared by	Every watch of that configuration	No other watch
Typical form	Digits, sometimes with letters, such as 126710BLRO	A longer alphanumeric string
Used for	Valuation and market comparison	Production date, warranty, theft records
Safe to post publicly	Yes	No

Where to look

Between the lugs at 12 o’clockUnclip or fold the bracelet away from the top of the case and look at the flat surface between the two lugs. On most modern Rolex references this is the reference number. You may need a loupe or a phone camera at full zoom, and light raking across the surface rather than straight on.
Between the lugs at 6 o’clockThe same operation at the bottom of the case. Historically this is where the serial number is engraved.
The rehaut, the inner ring around the dialOn many Rolex watches produced from the mid-2000s onward, the serial is engraved on this inner flange, usually visible at 6 o’clock through the crystal. If you can read a number there, that is it.
The warranty card and paperworkBoth numbers normally appear on the card. If you have it, this is far easier than squinting at engraving, and it also lets you check that the card and the watch agree.
The caseback, on some brandsRolex generally does not engrave these on the caseback, but many other manufacturers do. If the watch is not a Rolex, check the caseback first.

Why the reference is the number that matters

A model name covers decades. "Submariner" spans references with different movements, cases, bracelets and lume, trading across a very wide range. The reference pins it to one configuration, which is what makes a quote mean anything. Any buyer who gives you a number without asking for the reference is quoting a category, not your watch.

Why to keep the serial private

The serial is the number that identifies your specific watch, and it is the number someone would want in order to pair a counterfeit with a credible-looking set of papers. It also appears in warranty and theft records. There is no reason a buyer needs it before they have your watch in front of them, and there is no reason for it to appear in a public listing.

Share the reference number freely, including in listings.
Do not publish the serial, and blur or crop it out of photographs you post.
Do not post a photograph of the warranty card publicly. It carries both numbers.
Record the serial somewhere private for your own insurance and in case of theft.

If you cannot find either

It is common, particularly on older watches where engraving has worn or where the bracelet does not fold clear. It does not stop a sale. Photograph the dial, the caseback, the case profile and the clasp, and a specialist can usually identify the reference from the watch itself. Confirmation then happens at inspection.

The reference gets you a price. The serial is nobody else’s business until the deal is real.

Not sure what you have?

Send photographs to WatchCash and we will identify the reference for you, with no obligation. Leave the serial out of anything you send over an open channel. The main US location is 110 E Broward Blvd #1700 in downtown Fort Lauderdale, by appointment.

Common questions

Where is the reference number on a Rolex?

Engraved between the lugs at 12 o’clock on most modern references. Fold the bracelet clear of the top of the case and use a loupe or a phone camera at full zoom, with light raking across the engraving rather than straight on.

Where is the serial number?

Historically between the lugs at 6 o’clock. On many Rolex watches from the mid-2000s onward it is engraved on the rehaut, the inner ring around the dial, visible at 6 o’clock through the crystal. It is also printed on the warranty card.

Should I give my serial number to a watch buyer?

Not up front, and never in a public listing. The reference is all a buyer needs to quote. The serial identifies your individual watch and is the number a forger would want to pair with papers.

Can a watch be valued without the reference number?

Yes, from good photographs, because a specialist can usually identify the reference from the watch. Having the reference just makes the quote faster and tighter.

Ready to sell?

Get a free, no-obligation valuation. We value your exact reference and explain how we reached the number.

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Keep reading

How a Buyer Reads Your Watch in the First 90 Seconds The order a professional checks a watch in, what each step is ruling out, and why knowing the sequence lets you present your watch accurately instead of nervously.
What Box and Papers Really Do to a US Offer How much a complete set actually adds, why a matching warranty card matters more than the box, and what to do when the paperwork is lost. Written for sellers in the US market.
How to Spot a Fake Luxury Watch The checks that catch most counterfeits, the ones that no longer work, and why only a movement inspection settles it. For buyers checking a private sale and owners checking an inheritance.