Pre-Owned Watch Inspection Checklist: Rolex, Audemars Piguet and Patek Philippe, Point by Point

A pre-owned Rolex, Audemars Piguet or Patek Philippe should be inspected in a fixed order, from the outside in: case and lugs, bracelet and clasp, crown and crystal, bezel, dial and hands, lume, then the movement as you wind and set it, and finally the serial number, warranty card and service receipts. Each finding either confirms the asking price or gives you a reason to adjust it, and this checklist states what each finding usually does to price. It is written for a buyer sitting across a table from the watch, but a seller can use it to grade honestly before setting a price. Bizak & Co. sources pre-owned watches to order and inspects each one against the same list; the pre-owned watches collection shows the references it applies to most often.

Last reviewed on October 17, 2026 by Filip Biczak. Prices are dated observations, not quotes.

What you need before you start

Bring a 10x loupe, a small torch or phone light, a soft cloth, the listing printed or on your phone, and the brand's own product page for the reference open so you can compare the dial layout and bracelet. Ask the seller in advance for the serial number and a photograph of the warranty card or certificate, so you can check the two match before you travel. Inspect in daylight where possible; showroom spotlights hide polishing and flatter dials. Give yourself twenty minutes and do not let anyone hurry the movement checks, which take the longest.

Case and lugs: has it been polished?

Hold the watch at eye level and look along the lugs. On a Rolex Oyster case the lug tops are brushed and the chamfers along the edges are polished; the line between them should be crisp. On a Royal Oak the alternation of brushed and polished facets on the case, bezel and bracelet is the whole design, and a polisher who has softened one edge has usually softened all of them. On a Nautilus or Aquanaut the case sides are brushed with polished bevels on the bezel and the ears. Rounded edges, brushing that changes direction, a case back whose engraving looks shallow, and lug holes that have lost their sharp rim all indicate polishing. Then look for dents in the case back and the lug undersides, which polishing does not remove.

Effect on price. One light, competent polish on a modern sports watch is common and costs a little against an unpolished example. Heavy polishing that has changed the case profile costs much more, and on a Royal Oak or Nautilus it can take the watch out of the collector market altogether, because the case cannot be put back.

Bracelet and clasp: stretch, pins and wear

Hold the watch by the case and let the bracelet hang, then lay it flat and push the links together. Play between links, or a bracelet that droops in a curve rather than falling straight, is stretch; on modern solid-link bracelets it is rare and suggests heavy wear or a harsh cleaning regime. Count the links and compare to the standard count for the reference and the spare links that came with the watch. Check the clasp: a Rolex Oysterlock should click shut firmly, the Glidelock on a Submariner and the Easylink on a GMT-Master II should slide and lock without play, and the clasp cover should not be scratched through its brushing. On a Royal Oak the integrated bracelet tapers from the case and the AP folding clasp should engage with a positive click; the links are held by screws and pins and any gap at the end link where the bracelet meets the case is a warning sign. On an Aquanaut the composite strap is a wear item and a replacement from Patek is normal; on a Nautilus the bracelet is integrated and the fold-over clasp should sit flush.

Effect on price. A bracelet with missing links costs the price of the links plus the inconvenience of finding them. Stretch or a worn clasp costs more than its repair price because it signals heavy wear elsewhere. A non-original bracelet or strap on a Rolex or AP is a different watch and should be priced as head only plus the value of the replacement.

Crown, crystal and bezel

Unscrew the crown, which should take a couple of turns and release cleanly, then screw it back down and feel for cross-threading or a crown that does not seat flush against the case or crown guards. The crown logo should be crisp. Look at the crystal edge-on for chips and through it for scratches; sapphire scratches are rare and usually mean the watch has been through something. On a Rolex the laser-etched crown at 6 on the crystal should be present on any modern reference. Turn the bezel: a Submariner or GMT-Master II bezel should click through 120 positions in one direction only with no back-play, and the Cerachrom insert should show no chips at its edge. On a Royal Oak the bezel is fixed and its eight hexagonal screws should sit with their slots aligned in the AP pattern; crossed or damaged screw heads indicate amateur work. On a Nautilus the bezel ears should be free of dents.

Effect on price. A damaged crown tube or a chipped Cerachrom insert is a brand-service item, so deduct the service cost and the time without the watch. Misaligned or damaged bezel screws on a Royal Oak are a reason to walk away unless a service record explains them.

Dial, hands and lume

Compare the dial to the brand's product page for the reference. Check the text alignment, the font, the position of the printed crown or logo, and the finishing of the applied markers under the loupe. On a Rolex, the hands should be the correct shape for the reference and the lume plots should match the lume on the hands in colour and in glow. On a Royal Oak, inspect the Grande Tapisserie pattern under the loupe for even squares and look at the applied markers and the AP logo for sharp edges. On a Nautilus or Aquanaut, the horizontal embossing and the checkerboard relief should be consistent, and the date window should be cleanly cut with the date centred. Charge the lume with a torch for thirty seconds and check that every plot and both hands glow evenly; uneven glow means replaced hands or a relumed dial. A service dial or service hands are genuine parts but they are not original, and on a collectable reference the difference is large.

Effect on price. An original, correct dial confirms the ask. A service dial or service hands on a modern reference costs a clear step down and must be disclosed; on anything collectable it moves the watch into a different price band.

Movement: winding feel, setting and sound

With the crown unscrewed, wind the watch twenty turns in the first position. The winding should feel smooth with a quiet, even ratchet; grinding, roughness or a crown that slips are reasons to stop. Pull to the setting positions and check each function: on a Rolex Submariner the date should jump quickly in the first setting position, on a GMT-Master II the 12-hour hand should jump in hour steps while the 24-hour hand stays put, on a Royal Oak 15500ST the date should set in the first position and the hands in the second, and on an Aquanaut or Nautilus the date should advance without the hands moving. Hold the watch to your ear and tilt it; a healthy automatic rotor spins freely and quietly. Loud rotor noise, a rotor that stops abruptly or hands that jump when the crown is pushed in all point to a service. If the seller allows it, leave the watch on a timing app for a few minutes; a modern Rolex should sit within a few seconds a day and a modern AP or Patek within the brand's own tolerance, and a watch running a minute a day fast is usually magnetised or overdue a service.

Effect on price. A movement that winds and sets correctly confirms the ask. Any mechanical fault means a brand service at the buyer's cost, and a service on a Royal Oak or a Patek is a larger figure than on a Rolex, so deduct accordingly.

Serial, warranty card and paperwork: do they match?

This is the step that cannot be skipped. On a Rolex made since the late 2000s the serial is engraved on the rehaut at 6 and should match the warranty card exactly; on older references it is between the lugs at 6. On a Royal Oak the serial and the reference are engraved on the case back. On a Patek Philippe the case number is engraved on the case and the movement number is inside, and both appear on the Certificate of Origin. Check the card or certificate for the reference, serial, dealer stamp and sale date, and look at the card itself: Rolex cards have changed format several times and a card whose format does not match the sale date is a reason to stop. Then ask for the purchase receipt, which fixes the first owner and the price paid, and any Extract from the Archives on a Patek Philippe or Audemars Piguet, which confirms the production and sale date from the brand's records. Rolex does not issue extracts, so on a Rolex the card does the work.

Effect on price. A matching card confirms the ask. A missing card on a modern watch is the largest paperwork deduction a buyer can make; a card whose serial does not match the watch means no sale at any price.

Service receipts: what they tell you

Ask for every service receipt and read them. A brand service receipt names the service centre, lists the work done and the parts replaced, and on a Rolex carries a two-year service guarantee from the date of return; Rolex describes its service process on its watch care and service pages and Audemars Piguet on its care programme pages. A receipt that lists a dial, hands or a bezel insert explains any mismatch you found in the earlier steps and should lower the price on a collectable reference. An independent watchmaker's receipt is useful but carries no brand guarantee and may mean non-brand parts. No receipts at all on a watch more than seven or eight years old means the buyer should budget a service and price it in.

Effect on price. A recent brand service with the guarantee still running supports the ask and can justify a small premium over an unserviced example. No service record on an older watch costs at least the price of a service.

Brand-specific checks: Rolex, Audemars Piguet and Patek Philippe

The brand pages for the GMT-Master II, the Royal Oak and the Aquanaut show the current configurations of each line, which is the reference point for every dial and bracelet comparison above. For deeper reference-level checks see our guides to vintage Submariner authentication and Royal Oak authentication.

What each finding does to price: three catalogue examples

The table below takes three references from Bizak & Co.'s sourced catalogue, with asks dated October 17, 2026, and shows where the brand new and pre-owned asks sat on the same day. The gap between the two is the room in which condition, paperwork and service findings move the price.

Those figures describe what we saw on one day and will move. The useful lesson is the shape of each gap: where the pre-owned ask is close to brand new, the inspection has to find nothing; where the gap is wide, each finding is worth more. Our GMT-Master II 126710BLNR guide and Aquanaut 5167 guide cover the references in detail, and the Audemars Piguet price guide gives context for the Royal Oak.

The checklist in one list

• Case and lugs. Crisp chamfers, one-direction brushing, no rounded edges, dents noted.
• Bracelet and clasp. No stretch, correct link count, clasp and extension working, no end-link gap.
• Crown. Unscrews and reseats cleanly, logo crisp, no cross-threading.
• Crystal. No chips at the edge, etched crown present on a Rolex.
• Bezel. Correct clicks and no back-play on a diver or GMT; aligned, undamaged screws on a Royal Oak.
• Dial and hands. Matches the brand page, original not service parts, date centred.
• Lume. Even glow on every plot and both hands.
• Movement. Smooth winding, every function sets correctly, quiet rotor, timekeeping within tolerance.
• Serial and card. Match exactly; card format matches the sale date.
• Service receipts. Read for replaced parts; brand guarantee date noted.
• Price against the band. A full-set watch offered well under the market is the most reliable warning sign of all.

Our authentication process describes how we apply this list before a sourced watch is released to a client.

Quick answers

How do I check if a pre-owned Rolex is genuine?

Match the rehaut serial to the warranty card, compare the dial and hands to the Rolex product page, check the laser-etched crown on the crystal, confirm the bezel clicks correctly, and feel the winding and setting. Any mismatch between serial and card ends the inspection.

How much does polishing reduce the value of a luxury watch?

One light polish on a modern Rolex costs a little against an unpolished example. Heavy polishing that has rounded the case costs much more, and on a Royal Oak or Nautilus it can remove the watch from the collector market because the facets cannot be restored.

What does bracelet stretch mean on a pre-owned watch?

Play between links or a bracelet that droops rather than hanging straight. On modern solid-link bracelets it indicates heavy wear and usually means the rest of the watch has had a hard life, so it is a reason to deduct more than the repair cost.

Does a pre-owned watch need a service receipt?

Not always, but a watch more than seven or eight years old with no record should be priced as if it needs a service. A recent brand service receipt with the guarantee still running supports the asking price.

How much was a pre-owned Rolex GMT-Master II 126710BLNR in October 2026?

Bizak's sourced catalogue listed a pre-owned 126710BLNR from US$19,184 and brand new examples at US$20,048 on Oyster and US$21,013 on Jubilee on October 17, 2026, sourced to order; the figures will move and depend on condition and paperwork.

Request a pre-owned sourcing quote

Tell us the reference, preferred year range, condition and whether a warranty card is required, plus your budget and timing, through our sourcing enquiry form. We inspect the specific watch against this checklist and send photographs, the card and the final price before you commit. Catalogue entries used above: pre-owned GMT-Master II 126710BLNR, 126710BLNR on Oyster, pre-owned Royal Oak 15500ST black dial, Royal Oak 15500ST, Aquanaut 5167A-001 and pre-owned Aquanaut 5167A; browse the GMT-Master II collection, the Royal Oak collection, the Aquanaut collection or sell or trade your watch.

Related reading: Beyond the dial: provenance, certification and service history · Digital provenance for luxury watches · Submariner 126610LN guide · How to sell a Rolex.