Frequently Asked Questions

Where was Rolex founded, and who founded it?

Rolex was founded in London in 1905 by Hans Wilsdorf and his brother-in-law Alfred Davis under the name “Wilsdorf & Davis.” The company moved to Geneva, Switzerland in 1919 and was renamed Rolex. Wilsdorf was German, not Swiss, and was not a watchmaker by trade.

What does the Rolex name mean?

The origin of the name “Rolex” is debated. Wilsdorf wanted a name that could be pronounced in any language and fit easily on a dial. Some suggest it derives from the French horlogerie exquise (“exquisite horology”), while others believe it was simply invented. The trademark was registered in 1908.

What was Rolex’s most important innovation?

The 1926 Oyster case — the world’s first truly waterproof wristwatch — is widely considered Rolex’s most significant contribution to horology. Other milestones include the first self-winding rotor (1932), the Datejust with automatic date change (1945), the Submariner (1953), and the GMT-Master dual time zone watch (1954).

How do I find the serial number on my Rolex?

The serial number is engraved on the side of the case at the 6 o’clock end, between the lugs. You will need to remove the bracelet to see it — this should only be done by a qualified watchmaker to avoid scratching the case. Never purchase a Rolex if the serial number has been removed or tampered with.

How do I find the model (reference) number on my Rolex?

The reference number is engraved on the case at the 12 o’clock end, between the lugs. Like the serial number, the bracelet must be removed to access it. Vintage Rolexes typically have 4-digit references; modern models have 5 or more digits.

How do I read a Rolex reference number?

The reference number encodes the model, bezel type, and case material. For example, reference 16014 breaks down as 160 | 1 | 4 — 160 = Datejust, 1 = Finely Engine Turned bezel, 4 = Stainless with 18k White Gold. See the Model Numbers and Bezel/Case Material tables above for the full code breakdown.

What do the bracelet clasp codes mean?

The clasp code stamped inside the bracelet hinge indicates the month and year of manufacture. The letter corresponds to the year and the number to the month. For example, G4 = April 1982. Service replacement bracelets carry an additional “S” stamp.

What is the Rolex country code on the Guarantee Certificate?

The 3-digit country code in the upper left corner of the Rolex Guarantee Certificate identifies the country where the watch was sold. There is no code for the USA, and most watches made before 1980 will not have one. See the full country code table above.

Are Rolex watches waterproof?

Most Rolex Oyster models are water-resistant to at least 100 meters (330 feet). The Submariner is rated to 300 meters and the Sea-Dweller to 1,220 meters. Water resistance can degrade over time — Rolex recommends having the seals tested annually if the watch is regularly exposed to water.

How often should a Rolex be serviced?

Rolex recommends servicing approximately every 10 years under normal use, though vintage models may require more frequent attention. A full service includes cleaning, lubrication, seal replacement, and timing regulation.

Rolex Servicing Overview

Servicing a Rolex is a meticulous, multi‑step overhaul performed by certified watchmakers to maintain precision, reliability, and appearance. It is generally recommended every 5–10 years, with more frequent service for daily wearers or watches exposed to water or shocks.

Why Servicing Is Important

Rolex movements rely on lubricants and seals that degrade over time. Without regular maintenance, friction, dirt, and worn gaskets can cause timing errors, loss of water resistance, and permanent damage to components. Regular servicing also helps retain resale value, since a documented service history increases buyer confidence.

Recommended Service Interval

Official guidance places modern Rolex service intervals near 10 years, but practical intervals depend on usage. Daily wearers should consider servicing every 5–7 years, and watches used in water or extreme conditions may need attention sooner.

The Servicing Process

A full Rolex service is a comprehensive overhaul that typically follows these steps performed by authorized or certified technicians:

1. Initial inspection — record condition and any owner requests.

2. Disassembly — remove bracelet and separate movement from case.

3. Movement overhaul — full dismantling, ultrasonic cleaning, inspection, replacement of worn parts, reassembly, lubrication, and timing adjustment to chronometer standards.

4. Case and bracelet refinishing — polish or satin finish restored to original design. (on Request only)

5. Reassembly and sealing — movement cased, gaskets replaced, and waterproof testing performed.

6. Final checks — technical and aesthetic inspections to meet factory standards.

7. Return — watch returned with documentation and a service guarantee (commonly a two‑year warranty on parts and labor from many service centers).

Daily Care and Risks

• Routine cleaning: wipe with a microfiber cloth.

• Storage: keep in original box or protective case.

• Avoid: shocks, strong magnets, harsh chemicals.

• Polishing: occasional professional polishing only to preserve case lines.

• Water checks: test gaskets regularly if exposed to water.

Risks: Neglecting service can lead to costly movement damage and reduced resale value. Choose authorized centers for full factory support or vetted independents for cost savings.

How can I tell if a Rolex is authentic?

Key indicators include the smooth sweep of the seconds hand, the magnified Cyclops date lens, engraved serial and reference numbers between the lugs, and the weight and finish of the case and bracelet. Counterfeit Rolexes are illegal and will not perform or hold value. If in doubt, contact us for a professional assessment.

Does Experts Watches buy or trade Rolex watches?

Yes. We buy, sell, and trade pre-owned and vintage Rolex watches. Visit our Sell or Trade page to get started, or contact us directly.