Rolex authentication is the foundation of every watch we sell. Before any watch reaches you, our watchmakers put it through a thorough Rolex authentication process, verifying that it is genuine, correct and in the condition described. This page explains exactly how our Rolex authentication works and why it protects your money.
On this page
Why Rolex authentication matters
The pre owned market carries risk: counterfeits, replaced parts and misrepresented condition. Proper Rolex authentication removes that risk. Every watch we sell is verified genuine and sold with our warranty, so you never gamble on a private sale. Authentication is not a formality for us, it is the core of what an independent specialist does.
Our Rolex authentication process
Each watch is inspected by hand, opened to examine the movement, and checked against Rolex reference specifications. We verify the serial and reference numbers, test timekeeping and, where relevant, water resistance, and photograph the exact watch in our studio. Only once a watch passes every Rolex authentication check is it listed for sale.
What we check
Our watchmakers examine the movement, which is where most fakes fail, along with the dial printing, hands, bezel, case engravings and rehaut, the bracelet and clasp codes, and the serial and reference numbers. We cross reference the numbers with the case, movement and any papers. Learn the visible signs yourself in our guide to spotting a fake Rolex and our reference number guide.
Our authenticity guarantee
Every watch is sold as genuine and backed by our warranty. If a watch were ever found not to be as described, we stand behind it. This guarantee is what lets you buy a pre owned Rolex online with the same confidence as buying in person, and it is why Rolex authentication is central to our promise.
Buy an authenticated Rolex
Browse the full range of pre owned Rolex watches, each authenticated, warrantied and ready to ship, or compare values in our Rolex price guide. For the manufacturer overview see the official Rolex website and the Rolex overview on Wikipedia. Greenwich Watch Co is an independent dealer and is not affiliated with, sponsored by, or an authorised dealer of Rolex.
The 40 point inspection, by station
Every watch that enters our vault passes the same bench sequence regardless of source, price or how certain its provenance appears. The stations, and what each one decides:
| Station | What happens | What it decides |
|---|---|---|
| Documents and numbers | Reference, serial and papers reconciled against production records and stolen watch databases | The watch exists, legally and historically |
| Case and bracelet | Engravings, finishing transitions, link stamps and stretch under 10x magnification | Originality and honest condition grade |
| Dial and hands | Printing, lume application and aging consistency under the microscope | Factory dial versus service or refinished |
| Movement | Caseback opened; calibre architecture, engraving and service evidence examined | The definitive authenticity verdict |
| Performance | Timegrapher across positions, amplitude and beat error logged | Health now and service horizon |
| Water resistance | Pressure test where rated, gaskets replaced as needed | The spec on the dial is true again |
What the certificate actually contains
The certificate that ships with every watch is the inspection made portable. It records the reference and serial as verified, the movement calibre sighted in the case, the condition grade with notes specific enough to matter, replaced or service components disclosed explicitly, the timegrapher figures at inspection, the pressure test result and date, and the inspection date that starts your service clock. Two design decisions make it useful beyond our walls: it describes the watch rather than merely blessing it, so any watchmaker can verify our claims against the object; and it discloses honestly, because a service dial disclosed holds market value while one discovered later destroys trust and price together. When you eventually sell or trade, the certificate transfers, and watches returning to our desk with their certificate consistently quote at the top of their range, the document paying for itself on the way out.
Why in house authentication beats outsourced badges
Marketplace authenticity programs inspect a watch for minutes in a warehouse queue; the incentives reward throughput. Our model inverts this: we own every watch we sell, so a missed fake or a generous condition grade costs us the loss directly, not a platform’s reputation fund. That skin in the game is the real difference between authentication as marketing and authentication as underwriting, and it is why we publish the process in detail while platforms publish adjectives. It is also why the movement always gets opened, the step queue based programs skip most often and the only step that is definitive against current generation counterfeits, as our guide to spotting a fake Rolex explains at length.
Verify us, and everyone else
Trust that cannot be checked is decoration. Decode any reference we list through the free Rolex serial number lookup and confirm the configuration is real. Compare our asking price against the live ranges in the price guide and the quarterly Rolex Price Index, both computed from inventory anyone can browse. Book the video appointment and direct the camera yourself, movement running, engravings at macro. And when the watch arrives, take it to any independent watchmaker inside the 14 day return window; we would rather fund that inspection culture than compete against blind faith, because every watch that passes a skeptic’s bench makes the certificate worth more. Apply the identical standard to every seller you ever consider, us included, and the counterfeit economy simply has nothing to sell you.
Authentication versus service: what we do and do not do
The inspection decides what a watch is; it deliberately stops short of full service, and the distinction protects buyers. A movement running within specification gets documented and left sealed, because an unnecessary service replaces original parts, adds cost the buyer ultimately pays, and on vintage pieces can subtract value with every swapped component. A movement running outside specification gets serviced by our bench before the watch ever lists, with the work and any replaced parts disclosed on the certificate. What we never do is the silent cosmetic pass that plagues this industry: no undisclosed dial swaps, no polishing away a case’s history to sell sharpness that is not original, no relumed hands presented as factory. The result is inventory that grades honestly against itself, where an excellent grade means excellent and a worn grade is priced like it, which is the only way a condition scale means anything at all.
The vintage bench: where authentication becomes scholarship
Modern watches authenticate against factory records; vintage watches authenticate against expertise, because a 1960s reference has had sixty years to accumulate service parts, and the question shifts from is it real to how much of it is original. Our vintage intake documents period correctness component by component: dial variant against known production, hands against catalog images, bezel insert aging against the case’s own story, luminous material consistent with the era. Where service parts exist, and on honest vintage they usually do, the certificate says so and the price reflects it, which is precisely the disclosure the vintage market’s whisper networks are built to avoid. Collectors researching a vintage purchase anywhere can decode its reference era through the reference numbers guide first; four digits and five digits date a watch faster than any seller’s story.
The bench, by the numbers
Scale is part of the answer to why the process works: over 1,700 watches currently in inventory passed it, spanning 289 distinct Rolex references plus Omega, Patek Philippe, Audemars Piguet, Tudor, Cartier and Breitling, and the intake desk sees the counterfeit state of the art weekly, which keeps the checklist current in a way no published guide can be. The rejection rate tells the other half: a meaningful fraction of watches offered to our buying desk fail some station of the inspection, most commonly paper reconciliation and undisclosed service dials rather than outright fakes, and every rejection sharpens the standard the passing watches met. That flywheel, volume teaching the bench, the bench protecting the inventory, the inventory funding the volume, is the structural reason an independent dealer’s authentication can exceed a marketplace’s: we cannot afford to be wrong, and after this many watches, we rarely are. The index those watches generate is the same flywheel’s public output.
See the process run on your watch
The strongest version of this page is watching it happen. Book a video appointment on any watch in the collection and the specialist walks the stations live: engravings at macro, the movement running, the timegrapher if you ask, your questions directing the camera throughout. Selling, the same transparency runs in reverse; your quote’s inspection happens the day the box arrives with findings documented against your photographs, and the rare revision comes with the evidence attached. Either direction, the principle holds: a process worth trusting is one that performs identically when watched, and watching is free.
Frequently asked questions
How do you authenticate a Rolex?
Our watchmakers open and inspect the movement, verify serial and reference numbers, and check the dial, case, bezel and bracelet against Rolex specifications before any watch is listed.
Is every watch authenticated?
Yes. Every watch we sell passes our full Rolex authentication process and is sold with our warranty.
Can papers prove a Rolex is genuine?
No. Cards and papers can be faked, so authenticity must come from inspecting the watch itself, especially the movement, not the paperwork.
What if a watch is not as described?
We stand behind every sale with our warranty. If a watch were ever found not to be as described, we make it right.
Do you authenticate other brands?
Yes. Our watchmakers authenticate every brand we sell, including Omega, Patek Philippe and Audemars Piguet, using the same rigorous process.